@book{33045,
	author = {Nover, Lutz. and Mothes, Kurt. and Symposium on Cell Differentiation in Microorganisms, Plants and Animals (1976 : Thuringia)},
	title = {Cell differentiation in microorganisms, plants and animals},
	publisher = {North-Holland,},
	year = {1977},
	address = {Amsterdam :}
}