Özkan-Bakbak, Pınar. “Particle Swarm Optimization Design of Optical Directional Coupler Based on Power Loss Analysis”. International Journal of Intelligent Systems and Applications in Engineering 1, no. 2 (June 19, 2013): 29–33. Accessed October 1, 2025. https://www.ijisae.org/index.php/IJISAE/article/view/14.