1. Das Turnierproblem für Spiele zu je dreien;Peltesohn;Inaugural dissertation,1936
2. Integral boundary points of convex polyhedra;Hoffman,1956
3. On separating systems of a finite set;Katona;J. Combinatorial Theory,1966
4. A few remarks on chromatic scheduling;de Werra,1975
5. A Simple Proof of the Erdös-Chao Ko-Rado Theorem;Katona;J. Combinatorial Theory,1972