El Halabi, Ezzat, and Matthew Doolan. “Causal Loops in Automotive Recycling”. Proceedings of the 56th Annual Meeting of the ISSS - 2012, San Jose, CA, USA00 (March 8, 2013). Accessed April 18, 2024. https://journals.isss.org/index.php/proceedings56th/article/view/1968.