On Ray Shooting in Convex Polytopes. J. Matousek; O. Schwarzkopf — 1993 Discrete & computational geometry
Euclidean Minimum Spanning Trees and Bichromatic Closest Pairs. H. Edelsbrunner; E. Welzl; P.K. Agarwal; O. Schwarzkopf — 1991 Discrete & computational geometry
On Lazy Randomized Incremental Construction. O. Schwarzkopf; M. de Berg; K. Dobrindt — 1995 Discrete & computational geometry
Piecewise Linear Paths Among Convex Obstacles. J. Matousek; O. Schwarzkopf; M. de Berg — 1995 Discrete & computational geometry