Rota, G. C. Introduction.- Ryser, H. J. Combinatorial matrix theory.- Greene, C. and Kleitman, D. J. proof techniques in the theory of finite sets.- Graham, R.L. and Rothschild, B. L. Ramsey theory.- Stanley R. F. Generating functions.- Spencer, J. Nonconstructive methods in discred mathematics.- Brylawski, T. and kelly, D. G. Matroids and combinatorial geometries.- Hall, M. combinatorial constructions