Romsai, W. ., T. Jitwang, and D. . Puangdownreong. “Optimal Design of Fourth-Order Active Band-Pass Filter via Grey Wolf Optimizer”. Journal of Advanced Development in Engineering and Science, vol. 15, no. 42, May 2025, pp. 92-110, https://ph03.tci-thaijo.org/index.php/pitjournal/article/view/3101.