@book{41217,
	author = {Bellman, Richard,},
	title = {Perturbation techniques in mathematics, engineering & physics /},
	publisher = {Dover Publications,},
	year = {2003.},
	address = {Mineola, N.Y. :},
	note = {Originally published: New York : Holt, Rinehart and Winston, c1964 in series: Athena series; selected topics in mathematics.},
	url = {http://www.loc.gov/catdir/description/dover031/2003046260.html}
}