Khattara A, Cherif-Khettaf WR, Mostefai M. RETRACTED: An Efficient Metaheuristic Approach for the Multi-Period Technician Routing and Scheduling Problem. Eng. Technol. Appl. Sci. Res. [Internet]. 2019 Oct. 9 [cited 2024 Jul. 17];9(5):4718-23. Available from: https://etasr.com/index.php/ETASR/article/view/3091