@book{7089,
	author = {Li, Ronghua. and Chen, Zhongying,},
	title = {Generalized difference methods for differential equations :},
	publisher = {M. Dekker,},
	year = {c2000.},
	address = {New York :},
	url = {http://www.loc.gov/catdir/enhancements/fy0647/99051331-d.html}
}