@incollection { Luhmann1976,
title = {Zur systemtheoretischen Konstruktion von Evolution },
author = {Luhmann, Niklas },
editor = {Lepsius, M. Rainer },
pages = {49-52 },
year = {1976 },
publisher = {Ferdinand Enke },
isbn = {3-432-88471-0 },
url = {http://nbn-resolving.de/urn:nbn:de:0168-ssoar-160613 },
}