@book{7666,
	author = {Bergman, Stefan, and Schiffer, Menahem,},
	title = {Kernel functions and elliptic differential equations in mathematical physics /},
	publisher = {Academic Press,},
	year = {1953.},
	series = {Pure and applied mathematics (Academic Press) ;},
	address = {New York :},
	note = {Includes index.}
}