Media type: E-Article Title: The evolution of Luhmann's systems theory with focus on the constructivist influence Contributor: Herting, Stephan; Stein, Lars Published: Informa UK Limited, 2007 Published in: International Journal of General Systems, 36 (2007) 1, Seite 1-17 Language: English DOI: 10.1080/03081070600899412 ISSN: 0308-1079; 1563-5104 Origination: Footnote: