Nanthavanij, Suebsak, Sorawit Yaoyuenyong, and Chawalit Jeenanunta. “Heuristic Approach to Workforce Scheduling With Combined Safety and Productivity Objective”. International Journal of Industrial Engineering: Theory, Applications and Practice 17, no. 4 (September 9, 2010). Accessed June 19, 2026. https://www.ijietap.com/ijietap/index.php/ijie/article/view/370.