Ab. Wahab, Norfishah, I. Pasya, M. F. Abdul Khalid, I. M. Yassin, S. H. Herman, and Z. Awang. “Pseudo-Elliptic Bandpass Filters Using Closed-Loop Resonator”. International Journal on Advanced Science, Engineering and Information Technology 7, no. 2 (April 15, 2017): 345–351. Accessed June 2, 2024. https://ijaseit.insightsociety.org/index.php/ijaseit/article/view/1362.