@book{11201,
	author = {Gohbarg, I and Kac, M.  and Kac, M. ; jt. ed.},
	title = {Topics in functional analysis; essays dedicated to M. G. Krein on the occasion of his 70th birthday},
	publisher = {Academic Press},
	year = {1978},
	series = {Advances in Mathematics, supplementary studies },
	address = {New York}
}