L. Peng, Y. J. Qiu, X. Jiang, and C. L. Ruan. 2021. “A Low-Pass Filter With Sharp Transition and Wide Stop-Band Designed Based on New Metamaterial Transmission Line”. The Applied Computational Electromagnetics Society Journal (ACES) 31 (10):1250-56. https://journals.riverpublishers.com/index.php/ACES/article/view/9887.