@book{7940,
	author = {Bogoli︠u︡bov, N. N. and Mitropolʹskiĭ, I︠U︡. A.},
	title = {Asymptotic methods in the theory of non-linear oscillations/},
	publisher = {Hindustan Pub. Corp., [stamped:},
	year = {1961.},
	address = {Delhi,},
	edition = {[2. ed.].},
	note = {[Russian monographs and texts on advanced mathematics and physics. v. 10]}
}