@inbook {Wood2007Elsevier,
	title = {{Overview of software packages used in geomorphometry}},
	booktitle = {Geomorphometry: concepts, software, applications},
	series = {Developments in Soil Science},
	year = {2008},
	pages = {257-267},
	publisher = {Elsevier},
	organization = {Elsevier},
	author = {Wood, J.},
	editor = {Hengl, T. and Reuter, H.~I.}
}