Kadhim Al-Zuwaini, Mohammad, and Najah Ali Husein. “Local Search Methods to Solve Multiple Objective Function”. Journal of Al-Qadisiyah for Computer Science and Mathematics, vol. 6, no. 1, Aug. 2017, pp. 57-74, https://jqcsm.qu.edu.iq/index.php/journalcm/article/view/127.