R. Deumlich

On perturbations of certain nonconvex optimization problems

K. Elster, R. Deumlich, 1986 .

On duality concepts in fractional programming

R. Deumlich, 1992 .

Recent results on separation of convex sets 1

Reinhard Deumlich, K. Elster, R. Nehse, 1978 .

Konvexe mengen in projektiven räumen

K. Elster, R. Deumlich, 1977 .