1. E. Parzen,Modern probability theory and its applications, Wiley, New York 1960, p. 100.
2. G. E. Andrews,The theory of partitions, Addison-Wesley, Reading, Mass 1976, Chapt. 3 and Table 14.7.
3. I. P. Goulden and D. M. Jackson,Combinatorial enumeration, Wiley-Interscience, New York 1983, Section 2.5.