M. Bogataj, Z. Kravanja, and Z. Novak Pintarič, Eds., 2nd International Conference on Technologies & Business Models for Circular Economy: Conference Proceedings, vol. 2019. University of Maribor Press, 2020. Accessed: Feb. 28, 2026. [Online]. Available: https://old.press.um.si/index.php/ump/catalog/book/472