Dayıoglu Gulcu, Sevda, and Humar Kahramanli Ornek. “Solution of Multiple Travelling Salesman Problem Using Particle Swarm Optimization Based Algorithms”. International Journal of Intelligent Systems and Applications in Engineering 7, no. 2 (June 30, 2019): 72–82. Accessed December 19, 2025. https://mail.ijisae.org/index.php/IJISAE/article/view/1012.