@book{8363,
	author = {Sansone, Giovanni, and Conti, Roberto,},
	title = {Non-linear differential equations},
	publisher = {Pergamon Press; [distributed in the Western Hemisphere by Macmillan, New York]},
	year = {1964.},
	series = {International series of monographs in pure and applied mathematics,},
	address = {Oxford ;},
	edition = {Rev. ed.}
}