@book{316350,
	author = {Helgason, Sigur},
	title = {Differential geometry, lie groups, and symmetric spaces},
	publisher = {American Mathematical Society},
	year = {1978},
	series = {Graduate Studies in Mathematics Volume 34},
	address = {Rhode Island},
	note = {Inculdes solution to exercises, list of notational convetion, symbol frequently used, bibliographical refrence and index}
}