Drack, Manfred, and Wilfried Apfalter. “Is Paul Weiss’ and Ludwig Von Bertalanffy’s System Thinking Still Valid Today?”. Proceedings of the 50th Annual Meeting of the ISSS - 2006, Sonoma, CA, USA00 (June 23, 2006). Accessed November 23, 2024. https://journals.isss.org/index.php/proceedings50th/article/view/250.