Mirković, Marko, Janko Hodolič, and Dragan Radojević. “Aggregation for Quality Management”. Yugoslav Journal of Operations Research 16, no. 2 (September 1, 2006): 177–188. Accessed December 15, 2025. https://yujor.erc.fon.bg.ac.rs/index.php/yujor/article/view/193.