Franciscus Sommen

Generalized Hermitean Clifford-Hermite polynomials and the associated wavelet transform (2009)

Brackx, Fred, De Schepper, Hennie, De Schepper, Nele, Sommen, Franciscus

Discrete Clifford analysis : a germ of function theory (2009)

Brackx, Fred, De Schepper, Hennie, Sommen, Franciscus, Van De Voorde, Liesbet

We develop a discrete version of Clifford analysis, i.e., a higher-dimensional discrete function theory in a Clifford algebra context. On the simplest of all graphs, the rectangular Z(m) grid, the...

On the CK-extension for a Special Overdetermined System in Complex Clifford Analysis (2009)

De Knock, Bram, Pena Pena, Dixan, Sommen, Franciscus

In this paper we investigate a new overdetermined system in Rm+1, called RicSom system, arising from adding one extra real dimension to the Hermitian Dirac system in R-m, m = 2n, that uses the...

Special power series expansions of monogenic functions around surfaces of codimension two (2009)

Pena Pena, Dixan, Sommen, Franciscus

The Fourier transform in Clifford analysis (2009)

Brackx, Fred, De Schepper, Nele, Sommen, Franciscus

Discrete Clifford analysis : an overview (2009)

Brackx, Fred, De Schepper, Hennie, Sommen, Franciscus, Van De Voorde, Liesbet

From orthogonal to Hermitean Clifford analysis (2009)

Brackx, Fred, Bures, Jarolim, De Schepper, Hennie, Eelbode, David, Sommen, Franciscus, Soucek, Vladimir

An invitation to Clifford analysis on superspace (2009)

De Bie, Hendrik, Sommen, Franciscus

On Cauchy and Martinelli-Bochner integral formulae in Hermitean Clifford analysis (2009)

Brackx, Fred, De Knock, Bram, De Schepper, Hennie, Sommen, Franciscus

Euclidean Clifford analysis is a higher dimensional function theory, refining harmonic analysis, centered around the concept of monogenic functions, i.e.\ null solutions of a first order vector...

Hermitian Clifford-Hermite wavelets: an alternative approach (2008)

Brackx, Fred, De Schepper, Hennie, De Schepper, Nele, Sommen, Franciscus

A boundary value problem for Hermitian monogenic functions (2008)

BLAYA, RA, REYES, JB, PENA, DP, Sommen, Franciscus

Two-index Clifford-Hermite polynomials with applications in wavelet analysis (2008)

Brackx, Fred, De Schepper, Hennie, De Schepper, Nele, Sommen, Franciscus

Fundamental solutions for the super Laplace and Dirac operators and all their natural powers (2008)

De Bie, Hendrik, Sommen, Franciscus

On steering monogenic functions. (2008)

Pena Pena, Dixan, Sommen, Franciscus

The Cylindrical Fourier Spectrum of an L-2-basis consisting of Generalized Clifford-Hermite Functions (2008)

Brackx, Fred, De Schepper, Nele, Sommen, Franciscus

In this paper we devise a new so-called cylindrical Fourier transform within the Clifford analysis setting by substituting for the standard inner product in the classical exponential Fourier kernel a...

Fourier-Borel Transforms in Clifford Analysis and the Dual Fischer Decomposition (2008)

Sommen, Franciscus

In this presentation we introduce several generalizations to Clifford analysis of the classical Fourier-Borel transform for analytic of holomorphic functionals. We also prove that every analytic or...

Orthogonality of the generalized Hermitean Clifford-Hermite polynomials (2008)

Brackx, Fred, De Schepper, Hennie, De Schepper, Nele, Eelbode, David, Sommen, Franciscus

Clifford analysis is a higher-dimensional function theory offering a refinement of classical harmonic analysis. It is centred around monogenic functions, i.e. null solutions of the rotation invariant...

The Hermitian Clifford analysis toolbox (2008)

Brackx, Fred, De Schepper, Hennie, Sommen, Franciscus

Hermitian Clifford analysis focusses on monogenic functions taking values in a complex Clifford algebra, or in a complex spinor space. Here monogenicity is expressed by means of two complex mutually...

Hermitean Cauchy integral decomposition of continuous functions on hypersurfaces (2008)

Abreu Blaya, Ricardo, Bory Reyes, Juan, Brackx, Fred, De Knock, Bram, De Schepper, Hennie, Pena Pena, Dixan, ...

We consider Holder continuous circulant (2 x 2) matrix functions G(2)(1) defined on the Ahlfors-David regular boundary Gamma of a domain Omega in R-2n. The main goal is to study under which...

Generalized Moisil-Théodoresco systems and Cauchy integral decompositions (2008)

Abreu Blaya, Ricardo, Bory Reyes, Juan, Delanghe, Richard, Sommen, Franciscus

A theoretical framework for wavelet analysis in a Hermitean Clifford setting (2007)

Brackx, Fred, De Schepper, Hennie, Sommen, Franciscus

The mehler formula for the generalized Clifford-Hermite polynomials (2007)

Brackx, Fred, De Schepper, Nele, KOU, KI, Sommen, Franciscus

Continuous wavelet transform and wavelet frames on the sphere using Clifford analysis (2007)

CEREJEIRAS, P, FERREIRA, M, KAHLER, U, Sommen, Franciscus

Martinelli-Bochner formula using Clifford analysis (2007)

Sommen, Franciscus, PENA, DP

Codimension-p Paley-Wiener theorems (2007)

YANG, Y, QIAN, T, Sommen, Franciscus

Quaternionic Clifford analysis: the Hermitian setting (2007)

Pena Pena, Dixan, SABADINI, I, Sommen, Franciscus

Some Power Series Expansions for Monogenic Functions (2007)

Pena Pena, Dixan, Sommen, Franciscus

Clifford-Jacobi polynomials and the associated continuous wavelet transform in Euclidean space (2007)

Brackx, Fred, De Schepper, Nele, Sommen, Franciscus

A Clifford analysis approach to superspace (2007)

De Bie, Hendrik, Sommen, Franciscus

Duality for harmonic differential forms via Clifford analysis (2007)

ABREU-BLAYA, R, BORY-REYES, J, Delanghe, Richard, Sommen, Franciscus

Hermitean Clifford-Hermite polynomials (2007)

Brackx, Fred, De Schepper, Hennie, De Schepper, Nele, Sommen, Franciscus

Correct rules for Clifford calculus on superspace (2007)

De Bie, Hendrik, Sommen, Franciscus

On the structure of harmonic multi-vector functions (2007)

Delanghe, Richard, Sommen, Franciscus

Partial primitives for Clifford algebra-valued functions (2007)

Eelbode, David, Sommen, Franciscus

Discrete Dirac operators in Clifford analysis (2007)

FAUSTINO, N, KAHLER, U, Sommen, Franciscus

Sampling with bessel functions (2007)

KOU, KI, QIAN, T, Sommen, Franciscus

Hermite and Gegenbauer polynomials in superspace using Clifford analysis (2007)

De Bie, Hendrik, Sommen, Franciscus

On the Schwarz reflection principle for monogenic functions (2007)

Delanghe, Richard, Sommen, Franciscus

Spherical harmonics and integration in superspace (2007)

De Bie, Hendrik, Sommen, Franciscus

A Martinelli-Bochner formula for the Hermitian Dirac equation (2007)

Sommen, Franciscus, PENA-PENA, D

Fischer decomposition and special solutions for the parabolic Dirac operator (2007)

CEREJEIRAS, P, Sommen, Franciscus, VIEIRA, N

Fundaments of Hermitean Clifford analysis. I. Complex structure. (2007)

Brackx, Fred, BURES, J, De Schepper, Hennie, Eelbode, David, Sommen, Franciscus, SOUCEK, V

Fundaments of Hermitean Clifford analysis. II. Splitting of h-monogenic equations. (2007)

Brackx, Fred, BURES, J, De Schepper, Hennie, Eelbode, David, Sommen, Franciscus, SOUCEK, V

A Davydov theorem for the isotonic Cauchy transform. (2007)

BORY REYES, J, Pena Pena, Dixan, Sommen, Franciscus

Quaternionic Clifford analysis: the Hermitian setting. (2007)

Pena Pena, Dixan, SABADINI, I, Sommen, Franciscus

The generalized Hermitean Clifford-Hermite continuous wavelet transform (2007)

Brackx, Fred, De Schepper, Hennie, De Schepper, Nele, Sommen, Franciscus

Haar wavelets is a Clifford algebra (2007)

Sommen, Franciscus

Clifford-Jacobi Polynomials and the Associated Continuous Wavelet Transform in Euclidean Space (2007)

Brackx, Fred, De Schepper, Nele, Sommen, Franciscus

Specific wavelet kernel functions for a continuous wavelet transform in Euclidean space are presented within the framework of Clifford analysis. These multi-dimensional wavelets are constructed by...

Monogenic function theory on Poincare geometry by means of a projective model (2006)

Eelbode, David, Sommen, Franciscus

Clifford analysis on the null cone (2006)

Sommen, Franciscus

Distributions in Clifford Analysis: an Overview (2006)

Brackx, Fred, De Knock, Bram, De Schepper, Hennie, Sommen, Franciscus

Curved Radon transforms and factorization of the Veronese equations in Clifford analysis (2006)

De Knock, Bram, De Schepper, Nele, Sommen, Franciscus

Preface (2006)

Brackx, Fred, De Schepper, Hennie, Sommen, Franciscus

New Multivariable Polynomials and Their Associated Continuous Wavelet Transform in the Framework of Clifford Analysis (2006)

Brackx, Fred, De Schepper, Nele, Sommen, Franciscus

Differential Forms in Clifford Analysis (2006)

Eelbode, David, Sommen, Franciscus

Clifford Analysis on the Hyperbolic Unit Ball: A Survey Paper (2006)

Eelbode, David, Sommen, Franciscus

Clifford-Hermite-Monogenic Operators in the Polynomial Framework (2006)

Brackx, Fred, De Schepper, Nele, Sommen, Franciscus

Metric Dependent Clifford Analysis with Applications to Wavelet Analysis (2006)

Brackx, Fred, De Schepper, Nele, Sommen, Franciscus

Clifford-Hermite-monogenic operators (2006)

Brackx, Fred, De Schepper, Nele, Sommen, Franciscus

The two-dimensional Clifford-Fourier transform (2006)

Brackx, Fred, De Schepper, Nele, Sommen, Franciscus

Hypergeometric functions and the ultrahyperbolic Dirac operator (2006)

Eelbode, David, Sommen, Franciscus

Hyperbolic L-2-modules with reproducing kernels (2006)

EELPODE, D, Sommen, Franciscus

The Dirac operator on ultrahyperbolic manifolds (2006)

Eelbode, David, Sommen, Franciscus

An alternative proof of Fueter's theorem (2006)

Pena Pena, Dixan, QIAN, T, Sommen, Franciscus

A generalization of Fueter’s theorem (2006)

Pena Pena, Dixan, Sommen, Franciscus

Hermitian Clifford-Hermite wavelets (2006)

Brackx, Fred, De Schepper, Hennie, De Schepper, Nele, Sommen, Franciscus

Clifford-Hermite and two-dimensional Clifford-Gabor filters for early vision (2006)

Brackx, Fred, De Schepper, Nele, Sommen, Franciscus

Power series expansions of monogenic functions around surfaces of codimension two (2006)

Pena Pena, Dixan, Sommen, Franciscus

Separation of variables in Clifford analysis and its application to Rarita-Schwinger field (2006)

BURES, J, Sommen, Franciscus, SOUCEK, V, VAN LANCKER, P

Elements of metrodynamics (2006)

Sommen, Franciscus

The Clifford-Fourier transform (2005)

Brackx, Fred, De Schepper, Nele, Sommen, Franciscus

Clifford algebra-valued orthogonal polynomials in Euclidean space (2005)

Brackx, Fred, De Schepper, Nele, Sommen, Franciscus

Parabolic Dirac operators and the Navier-Stokes equations over time-varying domains (2005)

CEREJEIRAS, P, KAHLER, U, Sommen, Franciscus

The photogenic Cauchy transform (2005)

Eelbode, David, Sommen, Franciscus

The fundamental solution of the hyperbolic Dirac operator on R-1,R-m: a new approach (2005)

Eelbode, David, Sommen, Franciscus

On a bi-axial system related to the hyperbolic Dirac equation (2005)

Eelbode, David, Sommen, Franciscus

Differential forms and/or multi-vector functions (2005)

Brackx, Fred, Delanghe, Richard, Sommen, Franciscus

Special power series expansions for monogenic functions (2005)

Sommen, Franciscus, Pena Pena, Dixan

Cauchy integral decomposition of multi-vector valued functions on hypersurfaces (2005)

BLAYA, R, REYES, J, Delanghe, Richard, Sommen, Franciscus

A Hermitian setting for wavelet analysis: the basics (2005)

Brackx, Fred, De Schepper, Hennie, Sommen, Franciscus

Clifford-Jacobi polynomials and the associated continuous wavelet transform in Euclidean space (2005)

Brackx, Fred, De Schepper, Nele, Sommen, Franciscus

Advances in analysis and geometry - new developments using Clifford algebras (2004)

QIAN, T, HEMPFLING, T, MCINTOSH, A, Sommen, Franciscus

The Clifford-Laguerre continuous wavelet transform (2004)

Brackx, Fred, De Schepper, Nele, Sommen, Franciscus

The Clifford-Gegenbauer polynomials and the associated continuous wavelet transform (2004)

Brackx, Fred, De Schepper, Nele, Sommen, Franciscus

Harmonic multivector fields and the Cauchy integral decomposition in Clifford analysis (2004)

ABREU-BLAYA, R, BORY-REYES, J, Delanghe, Richard, Sommen, Franciscus

On the generalized Cauchy transform of power functions (2004)

Eelbode, David, Sommen, Franciscus

The inverse Radon transform and the fundamental solution of the hyperbolic Dirac equation (2004)

Eelbode, David, Sommen, Franciscus

Clifford algebra-valued orthogonal polynomials in the open unit ball of Euclidean space (2004)

Brackx, Fred, De Schepper, Nele, Sommen, Franciscus

Analysis of Dirac systems and computational algebra (2004)

COLOMBO, F, SABADINI, I, Sommen, Franciscus

The fundamental solution for the hyperbolic Dirac equation (2004)

Eelbode, David, Sommen, Franciscus

Taylor series on the hyperbolic unit ball (2004)

Eelbode, David, Sommen, Franciscus

The fundamental solution of the hyperbolic Dirac-equation (2004)

Eelbode, David, Sommen, Franciscus

Spherical means and distributions in Clifford analysis (2004)

Brackx, Fred, Delanghe, Richard, Sommen, Franciscus

Clifford analysis on the space of vectors, bivectors and l-vectors (2004)

SABADINI, I, Sommen, Franciscus

Spherical means, distributions and convolution operators in Clifford analysis (2003)

Brackx, Fred, Delanghe, Richard, Sommen, Franciscus

The Dirac complex on abstract vector variables: Megaforms (2003)

SABADINI, I, Sommen, Franciscus, STRUPPA, DC

The higher dimensional Hermite transform: a new approach (2003)

Brackx, Fred, De Schepper, Nele, Sommen, Franciscus

The bi-axial Clifford-Hermite continuous wavelet transform (2003)

Brackx, Fred, De Schepper, Nele, Sommen, Franciscus

Analysis of matrix Dirac operators (2003)

Sommen, Franciscus

The Hermite transform in quaternionic analysis (2003)

Brackx, Fred, De Schepper, Nele, Sommen, Franciscus

Deriving harmonic functions in higher dimensional spaces (2003)

QIAN, T, Sommen, Franciscus

Clifford analysis on super-space II (2003)

Sommen, Franciscus

On conjugate harmonic functions in Euclidean space. (2002)

Brackx, Fred, Delanghe, Richard, Sommen, Franciscus

Benchmarking of Three-Dimensional Clifford Wavelet Functions. (2002)

Brackx, Fred, Sommen, Franciscus

Clifford-Bessel wavelets in Euclidean space. (2002)

Brackx, Fred, Sommen, Franciscus

Symmetric analogues of Rarita-Schwinger equations. (2002)

BURES, J, Sommen, Franciscus, SOUCEK, V, Van Lancker, Peter

The spherical X-ray transform. (2002)

CEREJEIRAS, P, SCHAEBEN, H, Sommen, Franciscus

Clifford analysis on projective hyperbolic space. (2002)

CEREJEIRAS, P, KAHLER, U, Sommen, Franciscus

Integral Theorems for Functions and Differential Forms in C(M) : vol. 428. (2002)

ROCHA-CHAVEZ, R, SHAPIRO, M, Sommen, Franciscus

Series and integral representations for the biregular exponential function. (2002)

SABADINI, I, Sommen, Franciscus, STRUPPA DANIELE, C

Special first order systems in Clifford analysis and resolutions. (2002)

SABADINI, I, Sommen, Franciscus

Complexes of Dirac operators in Clifford algebras. (2002)

SABADINI, I, STRUPPA, DC, Sommen, Franciscus, Van Lancker, Peter

Clifford analysis on projective hyperbolic space II. (2002)

Sommen, Franciscus, CEREJEIRAS, P, KAHLER, U

Special issue: Clifford analysis in applications. (2002)

Sommen, Franciscus, SPROSSIG, W

Clifford-Bessel wavelets in Euclidean space (2002)

Brackx, Fred, Sommen, Franciscus

On conjugate harmonic functions in Euclidean space (2002)

Brackx, Fred, Delanghe, Richard, Sommen, Franciscus

Syzygies and conservation laws (2002)

COLOMBO, F, SABADINI, I, Sommen, Franciscus, STRUPPA, DC

Hermitian Clifford analysis and resolutions (2002)

SABADINI, I, Sommen, Franciscus

The spherical X-ray transform (2002)

CEREJEIRAS, P, SCHAEBEN, H, Sommen, Franciscus

Clifford analysis on projective hyperbolic space II (2002)

Sommen, Franciscus, CEREJEIRAS, P, KAHLER, U

Analysis using abstract vector variables (2002)

Sommen, Franciscus

Rarita-Schwinger type operators in Clifford analysis. (2001)

BURES, J, Sommen, Franciscus, SOUCEK, V, VAN LANCKER, P

Computational algebra and its promises for analysis. (2001)

SABADINI, I, Sommen, Franciscus, STRUPPA, DC

The continuous wavelet transform in Clifford analysis (2001)

Brackx, Fred, Sommen, Franciscus

Clifford analysis on the level of abstract vector variables (2001)

Sommen, Franciscus

Combinatorics and Clifford analysis (2001)

SABADINI, I, Sommen, Franciscus

Combinatorics and Clifford analysis (2001)

SABADINI, I, Sommen, Franciscus

Models for irreducible representations of Spin(m) (2001)

Van Lancker, Peter, Sommen, Franciscus, Constales, Denis

The generalized Clifford-Hermite continuous wavelet transform (2001)

Brackx, Fred, Sommen, Franciscus

Clifford analysis on super-space (2001)

Sommen, Franciscus

Multivariable functions of higher spin. (2000)

Sommen, Franciscus, BERNARDES, G

An extension of Clifford analysis towards super-symmetry. (2000)

Sommen, Franciscus

On a generalization of Fueter's theorem. (2000)

Sommen, Franciscus

Clifford-Hermite wavelets in Euclidean space. (2000)

Brackx, Fred, Sommen, Franciscus

Analysis of functional and differential forms in C-m (2000)

ROCHA-CHAVEZ, R, SHAPIRO, M, Sommen, Franciscus

Integral theorems for solutions of the complex Hodge-Dolbeault system (2000)

ROCHA-CHAVEZ, R, SHAPIRO, M, Sommen, Franciscus

Clifford analysis in two and several vector variables. (1999)

Sommen, Franciscus

Homogeneous monogenic functions in Euclidean space. (1998)

Sommen, Franciscus, Van Lancker, Peter

The general quadratic Radon transform. (1998)

DENECKER, K, VAN OVERLOOP, J, Sommen, Franciscus

Curved radon transforms in Clifford analysis (1998)

Sommen, Franciscus

Explicit solutions of the inhomogeneous Dirac equation. (1997)

Sommen, Franciscus, JANCEWICZ, B

The problem of defining abstract bivectors (1997)

Sommen, Franciscus

An algebra of abstract vector variables (1997)

Sommen, Franciscus

Definining a q-deformed version of Clifford analysis (1997)

Sommen, Franciscus

A product for special classes of monogenic functions and tensors (1997)

Sommen, Franciscus, Van Lancker, Peter

Monogenic Functions of Higher Spin (1996)

Sommen, Franciscus

Functions on the Spingroup (1996)

Sommen, Franciscus

Special first order systems in Clifford Analysis (1996)

Sommen, Franciscus

Special bi-axial monogenic functions (1995)

COMMON, AK, Sommen, Franciscus

Clifford tensor calculus (1995)

Sommen, Franciscus

Introducing q-deformation on the level of vector variables (1995)

Sommen, Franciscus, WATKINS, M

Special bi-axial monogenic functions. (1994)

COMMON, AK, Sommen, Franciscus

Reproducing kernels on the unit sphere (1994)

Brackx, Fred, Delanghe, Richard, Sommen, Franciscus, Van Acker, Nadine

Reproducing Bergman kernels in Clifford Analysis (1994)

Brackx, Fred, Sommen, Franciscus, Van Acker, Nadine

Functions of two vector variables (1994)

Sommen, Franciscus, Van Acker, Nadine

Axial Monogenic functions from Holomorphic functions. (1993)

COMMON, AK, Sommen, Franciscus

SO(M)-INVARIANT DIFFERENTIAL-OPERATORS ON CLIFFORD ALGEBRA-VALUED FUNCTIONS. (1993)

Sommen, Franciscus, VANACKER, N

Lie-groups as Spin groups. (1993)

DORAN, C, HESTENES, D, Sommen, Franciscus, VANACKER, N

Cauchy Transforms and bi-axial monogenic power functions (1993)

COMMON, AK, Sommen, Franciscus

An explicit realization of spinor spaces and its applications to Clifford analysis (1993)

Delanghe, Richard, Sommen, Franciscus, SOUCEK, V

SO(m)-Invariant operators on Clifford tensors (1993)

Sommen, Franciscus

Invariant differential operators on polynomial-valued functions (1993)

Sommen, Franciscus, Van Acker, Nadine

A distributional approach to vector manifolds (1993)

Sommen, Franciscus, WATKINS, M

The Clifford algebra Rmjn as an algebra of endomorphisms (1993)

Delanghe, Richard, Sommen, Franciscus, Van Acker, Nadine

Reproducing Kernels on the Unit Sphere (1993)

Brackx, Fred, Delanghe, Richard, Sommen, Franciscus, Van Acker, Nadine

Residues in Clifford Analysis (1992)

Delanghe, Richard, Sommen, Franciscus, SOUCEK, V

Monogenic differential operators (1992)

Sommen, Franciscus, Van Acker, Nadine

Spherical monogenics on the Lie sphere (1990)

Sommen, Franciscus

Special functions in Clifford analysis and axial symmetry (1988)

Sommen, Franciscus

On distributional boundary values and the zeros of harmonic functions (1985)

Sommen, Franciscus

Monogenic functions on surfaces (1985)

Sommen, Franciscus

Formele randwaarden van monogene functies en elliptische systemen in het vlak / (1984)

Sommen, Franciscus.

Proefschrift Gent.

Monogenic differential forms and homology theory (1984)

Sommen, Franciscus

Hypercomplex Fourier and Laplace transforms I (1982)

Sommen, Franciscus

Clifford analysis (1982)

Brackx, Fred, Delanghe, Richard, Sommen, Franciscus

A product and an exponential function in hypercomplex function theory (1981)

Sommen, Franciscus

Half Dirichlet problems for powers of the Dirac operator in the unit vail of RAm (m>=3). Bull. Soc. Math. Belg., 1990,43,3B, pp. 409-429.

Delanghe, Richard, Sommen, Franciscus, ZHENYUAN, XU

Clifford Algebra and Spinor Valued Functions. Mathematics and its Applications 53. Kluwer Acad. Publ., Dordrecht, 1992.

Delanghe, Richard, Sommen, Franciscus, SOUCEK, V

Clifford analysis, biaxial symmetry and pseudoanalytic functions. Complex Variables : Theory Appl., 1990, 13, 3-4, pp. 195-212.

JANK, G, Sommen, Franciscus

Spherical monogenics and the Lie sphere. A Funct. Anal., 1990, 92, pp. 372-402.

Sommen, Franciscus

Monogenic differential calculus. Transactions A.M.S., 1991, 326, 2, pp. 613-632.

Sommen, Franciscus

Clifford analysis and integral geometry. Proc. Second Workshop on Clif ford Algebras, Kluwer Acad. Publ., 1992, pp. 293-311.

Sommen, Franciscus

Fundamental solutions for operators which are polynomials in the Dirac operator. Proc. Second Workshop on Clifford Alfebras, Kluwer Acad. Publ., 1992.PP. 312-326.

Sommen, Franciscus, ZHENYUAN, XU

Vector manifolds from structure functions. Journ. Nat. Geom. 13 (1998) 77-118.

Sommen, Franciscus, WATKINS, M