@book {9783846760871, 
	title = "Niklas Luhmann",
	author = "Müller, Julian AND Lorenz, Ansgar",
	isbn = "9783846760871",
	edition = "1",
	keywords = "20. Jahrhundert, Einführung, Soziologie, Systemtheorie, System, Funktion, Zettelkasten, Autopoiesis, doppelte Kontingenz",
	url = "http://www.content-select.com/index.php?id=bib_view&ean=9783846760871",
	url = "https://content-select.com/de/portal/media/view/58c7ba7e-5e28-432b-9e2a-4d7db0dd2d03",
	publisher = "Wilhelm Fink Verlag",
	language = "ger",
}