1. On the assignment polytope;Balinski;SIAM Review,1974
2. Euclidean Geometry and Convexity;Benson,1966
3. Graphs and Hypergraphs;Berge,1973
4. Tres observaciones sobre el algebra lineal;Birkhoff;Univ. Nac. Tucumán Rev. Ser. A,1946
5. Flows in Networks;Ford,1962