1. Matching theorems for combinatorial geometries;Aigner;Bull. Amer. Math. Soc.,1970
2. Minimal dependent sets;Ashe;J. Australian Math. Soc.,1966
3. Un théorème sur les transformations biunivoques;Banach;Fundamenta Math.,1924
4. Models and Ultraproducts: An Introduction;Bell,1969
5. Théorie des Graphes et ses Applications;Berge,1958