Khelifa, Meriem, and Dalila Boughaci. “A Cooperative Local Search Method for Solving the Traveling Tournament Problem”. Computing and Informatics 37, no. 6 (February 4, 2019): 1386–1410. Accessed May 1, 2025. https://www.cai.sk/ojs/index.php/cai/article/view/2018_6_1386.