1. Properties of (0, 1)-matrices with no triangles;Anstee;J. Combin. Theory (A),1980
2. Graphs and Hypergraphs;Berge,1973
3. Hypergraph Seminar;Berge,1974
4. Graphs with balanced neighbourhoods;Brouwer;Preliminary research report,1978
5. Propriété de Helly et problèmes de Représentations;Duchet,1978