@book{47384,
	author = {Oprea, John},
	title = {Differential geometry and its applications /},
	publisher = {Mathematical Association of America,},
	year = {c2007},
	address = {Washington, D.C.  :},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0715/2007924394-t.html}
}