@book{8697,
	author = {Hofmann-Wellenhof, B. and Lichtenegger, Herbert.},
	title = {Global Positioning System: theory and practice },
	publisher = {Springer-Verlag,},
	year = {c2001.},
	address = {New York :},
	edition = {5th, rev. ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0816/2001266601-d.html}
}