Lee, Jinho. “Capacitated Location-Routing Problem for a Combined Manned-Unmanned Teaming System Using Lagrangian Relaxation and Location-Based Heuristic”. International Journal of Industrial Engineering: Theory, Applications and Practice 32, no. 5 (October 10, 2025). Accessed May 21, 2026. https://ijietap.com/index.php/ijie/article/view/10347.