@book {Neteler2008Springer,
	title = {{Open Source GIS: A GRASS GIS Approach}},
	year = {2008},
	pages = {406},
	publisher = {Springer},
	organization = {Springer},
	edition = {3rd},
	address = {New York},
	author = {Neteler, M. and Mitasova, H.}
}