1. Lectures in Algebraic Geometry;Abhyankar,1974
2. Enumerative uses of generating functions;Bender;Indiana Univ. Math. J.,1971
3. Advanced Combinatorics;Comtet,1974
4. On the foundations of combinatorial theory, VI, The idea of generating function;Doubilet,1972
5. Generating Functions and Enumeration of Sequences;Gessel,1977