Comtet, L (1974) Advanced combinatorics: The art of finite and infinite expansions. Boston: D. Reidel Pub. Hankin, R.K.S (2006) Additive integer partitions in R. Journal of Statistical Software, Code Snippets, 16. Olver, F.W.J., Lozier, D.W., Boisver, R.F., and Clark, C.W (2010) Handbook of Mathematical Functions. New York: National Institute of Standards and Technology, and Cambridge University Press.