@book{6923,
	author = {Johnson, Gerald W., and Lapidus, Michel L.},
	title = {The Feynman integral and Feynman's operational calculus /},
	publisher = {Clarendon Press ;},
	year = {2000.},
	address = {Oxford :},
	url = {http://www.loc.gov/catdir/enhancements/fy0637/99042820-d.html}
}