1. Infinite matching theory;R Aharoni;Discrete Math,1991
2. LP duality in infinite hypergraphs;R Aharoni;J. Combin. Theory Ser. B,1990
3. Sur le couplage maximum d'un graphe;C Berge;C. R. Acad. Sci,1958
4. On the minimal number of vertices representing the edges of a graph;P Erd?s;Publ. Math. Inst. Hungar. Acad. Sci,1961
5. A problem in graph theory;P Erd?s;Amer. Math. Monthly,1964