@book{13971,
	author = {Krasnosel'skii, M. A. and Others and Burd, V. Sh. ; jt. auth.},
	title = {Nonlinear almost periodic oscillations},
	publisher = {John Wiley},
	year = {1973},
	address = {New York},
	note = {"Tr. by A. Libin".}
}