@book{7952,
	author = {Pólya, George, and Szegő, Gábor,},
	title = {Problems and theorems in analysis :},
	publisher = {Springer,},
	year = {1976.},
	series = {Die Grundlehren der mathematischen Wissenschaften in Einzeldarstellungen,},
	address = {Berlin,},
	note = {Vol. 2 translated by C. E. Billigheimer.}
}