1. On the size of a maximum transversal in a Steiner triple system;Brouwer;Canad. J. Math.,1981
2. On a limit theorem in combinatorial analysis;Erdös;Publ. Math. Debrecen,1963
3. Problems and results on 3-chromatic hypergraphs and some related questions;Erdös;Colloq. Math. Soc. Janos Bolyai,1974
4. Near perfect coverings in graphs and hypergraphs;Frankl;European J. Combin.,1985
5. Nombre minimal de contacts de fermature nécessaires pour réaliser une fonction booléenne symétrique de n variables;Hansel;C.R. Acad. Sci. Paris,1964