@book{87976,
	author = {Ladyzhenskaya, Olga A. and Ural'Tseva, Nina N. and Scripta Technica.},
	title = {Linear and quasilinear elliptic-equations / },
	publisher = {Academic Press, },
	year = {1968.},
	series = {Mathematics in science and engineering ; },
	address = {New York, etc. : }
}