@book{40724,
	author = {Riordan, John},
	title = {An introduction to combinatorial analysis},
	publisher = {Princeton University Press},
	year = {1980, c1978.},
	address = {Princeton, N.J.},
	note = {Reprint of the ed. published by Wiley, New York, in series: A Wiley publication in mathematical statistics.}
}