The topological degree and fixed points of DC-mappings W. Kryszewski; Bogdan Przeradzki — 1985 Fundamenta Mathematicae
The Lefschetz type theorem for a class of noncompact mappings Kryszewski, W. — 1987 Proceedings of the 14th Winter School on Abstract Analysis
Equilibrium for perturbations of multifunctions by convex processes. Ben-El-Mechaiekh, H.; Kryszewski, W. — 1996 Georgian Mathematical Journal