1. On certain polytopes associated with graphs;Chvátal;J. Combinatorial Theory Ser. B,1975
2. A primal algorithm for optimum matching;Cunningham,1976
3. Submodular functions, matroids and certain polyhedra;Edmonds,1970
4. A min-max relation for submodular functions on graphs;Edmonds;Ann. Discrete Math.,1977
5. Submodular functions, graphs and integer polyhedra;Giles,1975