@book{7111,
	author = {Helgason, Sigurdur,},
	title = {Differential geometry, Lie groups, and symmetric spaces /},
	publisher = {Academic Press,},
	year = {1978.},
	series = {Pure and applied mathematics, a series of monographs and textbooks ;},
	address = {New York :},
	note = {Includes index.}
}