1. Generalization of Pólya's Fundamental Theorem in Enumerative Combinatorial Analysis;de,1959
2. Pólya's Theory of Counting;de,1964
3. Enumeration of Generalized Graphs;Bruijn;Indag. Math.,1969
4. The Number of Structures of Finite Relations;Davis,1953
5. Tables of Partitions, Madras;Gupta,1939