@book{43373,
	author = {Ross, Shepley L. and Ross, Shepley L.,},
	title = {Introduction to ordinary differential equations /},
	publisher = {Wiley,},
	year = {c1980 },
	address = {New York :},
	edition = {3rd ed.},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/description/wiley032/88021589.html}
}