Kalia, Weiz Shahzad, Dewanto Harjunowibowo, and Lenny. “Sales People Training Programme Scheduling Using Multiple Objective Linear Programming: Case Study of an Indonesian Motorcycle Distributor”. Journal of Mobile Multimedia 14, no. 1 (April 19, 2018): 75–94. Accessed April 25, 2026. https://journals.riverpublishers.com/index.php/JMM/article/view/4433.