@book{22613,
	author = {Zhao, Xiao-Qiang.},
	title = {Dynamical systems in population biology /},
	publisher = {Springer,},
	year = {c2003.},
	address = {New York :},
	url = {http://www.loc.gov/catdir/enhancements/fy0817/2002044507-b.html}
}