@book{792502,
	author = {Quarteroni, Alfio and Valli, A. },
	title = {Numerical approximation of partial differential equations /},
	publisher = {Springer,},
	year = {1997.},
	address = {Berlin ;},
	edition = {2nd, corr. print.},
	url = {http://www.loc.gov/catdir/enhancements/fy0812/97160884-d.html}
}