@book{95668,
	author = {Feshchenko, S. F. and Shkilʹ, N. I.},
	title = {Asymptotic methods in the theory of linear differential equations},
	publisher = {American Elsevier Pub. Co.},
	year = {1967.},
	series = {Modern analytic and computational methods in science and mathematics},
	address = {New York},
	note = {Translation of [Asimptoticheskie metody v teorii lineĭnykh different︠s︡ialʹnykh uraveniĭ]}
}