D. Lasser: Theory and Applications of Symplectic Geometry (in German).
1^st State Examination (equiv. to M.Sc.), Department of Mathematics, Technical University of Darmstadt, Germany, 259 pages, 1981.

D. Lasser: Introduction into the Theory of Special Relativity (in German).
2^nd State Examination, Seminar II, Darmstadt, Germany, 242 pages, 1983.

D. Lasser: Bernstein-Bézier representation of Trivariate Splines (in German).
Dissertation (equiv. to D.Sc.), Department of Mathematics, Technical University of Darmstadt, Germany, 174 pages, 1987.

D. Lasser: B-Spline-Bézier Volumes. Definition, Applications, Visualisation Techniques (in German).
Habilitation, Department of Computer Science, University of Kaiserslautern, Germany, 177 pages, 1993.