1. Hypergraphs with no special cycles;Anstee;Combinatorica,1983
2. Balanced matrices;Berge;Math. Programming,1972
3. Graphs and Hypergraphs;Berge,1973
4. Structural properties and recognition of restricted and strongly uni-modular matrices;Conforti,1985
5. Boolean Methods in Operations Research and Related Areas;Hammer,1968