Romsai, Wattanawong, Thiwa Jitwang, and Deacha Puangdownreong. 2025. “Optimal Design of Fourth-Order Active Band-Pass Filter via Grey Wolf Optimizer”. Journal of Advanced Development in Engineering and Science 15 (42). Babgkok, Thailand:92-110. https://ph03.tci-thaijo.org/index.php/pitjournal/article/view/3101.