Paper on Weiss and Bertalanffy presented at the ISSS 2006 50th annual meeting Stefan Blachfellner vor 20 Jahren At the ISSS 2006 (50th Annual Meeting) a paper by Drack and Apfalter was presented: Is Paul Weiss‘ and Ludwig von Bertalanffy’s System Thinking still valid today? Related posts 20th – 23rd January 2018. INCOSE International Workshop, Jacksonville, Florida, USA by Stefan Blachfellner 8 Jahren ago Enterprise as an instrument of civilization by Stefan Blachfellner 11 Jahren ago Robotic Discourses – the BCSSS was guest at the Universal Design Forum in Weimar by Stefan Blachfellner 8 Jahren ago