@book{7908,
	author = {Kantorovich, L. V. and Krylov, V. I.},
	title = {Approximate methods of higher analysis /},
	publisher = {Interscience,},
	year = {1958.},
	address = {New York :},
	note = {First published in 1936 under title: [Metody priblizhennogo reshenii︠a︡ uraveniĭ v chastnykh proizvodnykh]}
}