@book{201851,
	author = {Gurfil, Pini. and ebrary, Inc.},
	title = {Modern astrodynamics},
	publisher = {Academic,},
	year = {2006.},
	series = {Elsevier astrodynamics series},
	address = {Oxford :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10150550}
}