@book{12373,
	author = {Flaschel, P. and Klingenberg, W. and Klingenberg, W. ; jt. auth.},
	title = {Riemannsche Hilbert-mannigfaltigkeiten periodische Geodatische},
	publisher = {Springer-Verlag},
	year = {1972},
	series = {Lecture notes in Mathematics},
	address = {Berlin}
}