@book{33926,
	author = {Neteler, Markus. and Mitasova, Helena. and SpringerLink (Online service)},
	title = {Open Source GIS},
	publisher = {Springer US,},
	year = {2008.},
	address = {Boston, MA :},
	edition = {Third Edition.},
	url = {http://dx.doi.org/10.1007/978-0-387-68574-8}
}