@incollection {spies2002f,
	title = {3D-Blattbewegung und Wachstum},
	year = {2002},
	pages = {267--270},
	publisher = {Wichmann},
	url = {http://d-nb.info/96618503X},
	author = {Hagen Spies and Bernd J{\"a}hne},
	editor = {Thomas Luhmann}
}
