@book{9633,
	author = {Simmons, George. and Robertseon, John S.},
	title = {Differential Equations with Applications and Historical Notes},
	publisher = {McGraw-Hill,},
	year = {1991.},
	address = {New York:},
	edition = {2nd edition },
	url = {http://10.10.170.122:8080/browse/book/16425}
}