Chuan Shao, Yang Li, Liang Wang, and Chen Jin. 2021. “Compact Wideband Parallel-Coupled Microstrip Line Bandpass Filter With In-Line Structure”. Applied Computational Electromagnetics Society Journal (ACES) 32 (02):153-57. https://journals.riverpublishers.com/index.php/ACES/article/view/9741.