1. Complex Analysis;Ahlfors,1966
2. Lattice Theory;Birkhoff,1967
3. A decomposition for combinatorial geometries;Brylawski;Trans. Amer. Math. Soc.,1972
4. Uniquely representable combinatorial geometries;Brylawski,1973
5. The Tutte polynomial;Crapo;Aequationes Math.,1969