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