1. Preprints
The deformations of flat affine structures on the two-torus, preprint Nr. 04/11 der Fakultät für Mathematik, Karlsruher Institut für Technologie, also arXiv:1112.3263, Handbook of Teichmüller theory Vol. III, ed. A. Papadopoulos, in press.
Deformations and rigidity of lattices in solvable Lie groups, joint work with Benjamin Klopsch (Royal Holloway), preprint Nr. 03/11 der Fakultät für Mathematik, Karlsruher Institut für Technologie, also arXiv:1111.5589, submitted.
Flat Pseudo-Riemannian Homogeneous Spaces with Non-Abelian Holonomy Group, (with Wolfgang Globke), preprint Nr. 10/10 der Fakultät für Mathematik, Karlsruher Institut für Technologie, also arXiv:1009.3383, Proceedings of the AMS, in press.
Smooth rigidity of aspherical homogeneous manifolds,
(2006-2010, with Y. Kamishima)
2. Published Research articles
Virtually abelian Kähler and projective groups, (with Johannes Riesterer), Abhandlungen aus dem Mathematischen Seminar der Universität Hamburg 81, Issue 2 (2011), pp 191-213. (also arXiv:0911.2459)
Flat Pseudo-Riemannian manifolds and prehomogeneous affine representations,
in 'Handbook of pseudo-Riemannian Geometry and Supersymmetry', EMS, IRMA Lectures in Mathematics and Theoretical Physics 16, 2010, pp. 731-817. (availabe also as arXiv:0809.0824)
Deformation spaces for affine crystallographic groups,
in 'Cohomology of groups and algebraic K-theory',
Advanced Lectures in Mathematics 12, 2009, pp. 55-129.
(availabe also as arXiv:0809.0829v1)
Two problems concerning polycyclic spaces,
GUIDO’S BOOK OF CONJECTURES, (Edited by Indira Chatterji),
L'Enseign. Math., Monographie No 40, 2008.
Fiber spaces with solv-geometry: Preliminary report, (with Y. Kamishima),
Proceedings of Workshop on "Complex analysis and Geometry on Hyperbolic space"
Kyoto, RIMS Kokyuroku 1518, Kyoto University, Kyoto Japan, October 2006.
Automorphism groups of polycyclic by finite groups and arithmetic groups, (with F. Grunewald),
Publ. Math. IHES 104 (2006), no. 1
Aspherical Kähler manifolds with solvable fundamental group, (with V. Cortés),
Geometriae Dedicata 122, No 1 (2006)
Geodesics in Non-Positively Curved Plane Tessellations, (with N. Peyerimhoff),
Advances in Geometry, 6 (2006), no. 2
Is the deformation space of complete affine structures on the 2-torus smooth?, (with W.M. Goldman), Geometry and Dynamics (Cuernavaca 2003), Contemporary Mathematics 389 (2005)
Infra-solvmanifolds and rigidity of subgroups in solvable linear algebraic groups,
Topology, 43, No 4 (2004)
Proper affine spheres fibering over projective special Kähler manifolds, (with V. Cortés),
Asian Journal of Mathematics, 7, No 1 (2003)
Finite extensions and unipotent shadows of affine crystallographic groups,
C. R. Acad. Sci. Paris, Ser. I 335 (2002)
Abelian simply transitive affine groups of symplectic type, (with V. Cortés),
Annales de l'Institut Fourier 52, No 6 (2002)
Realisation of Special Kähler Manifolds as Parabolic Spheres, (with V. Cortés),
Proceedings of the AMS 129, No 8 (2001)
Curvature and Geometry of Tessellating Graphs, (with N. Peyerimhoff),
Discrete & Computational Geometry 25, No 1 (2001)
Varieties of Discontinuous Groups,
Crystallographic groups and their generalizations (Kortrijk, 1999),
Contemporary Mathematics 262 (2000)
Gluing Affine 2-Manifolds with Polygons,
Geometriae Dedicata 75 (1999)
Left-symmetric algebras for ,
Transactions of the AMS, 351 No 7 (1999)