@book{33746,
	author = {Sanders, Jan A. and Verhulst, Ferdinand. and SpringerLink (Online service)},
	title = {Averaging Methods in Nonlinear Dynamical Systems},
	publisher = {Springer New York,},
	year = {2007.},
	series = {Applied Mathematical Sciences,},
	address = {New York, NY :},
	url = {http://dx.doi.org/10.1007/978-0-387-48918-6}
}