Ab. Wahab, N., Pasya, I., Abdul Khalid, M. F., Yassin, I. M., Herman, S. H., & Awang, Z. (2017). Pseudo-Elliptic Bandpass Filters Using Closed-Loop Resonator. International Journal on Advanced Science, Engineering and Information Technology, 7(2), 345–351. https://doi.org/10.18517/ijaseit.7.2.1362