Zhang, J. ., H. . Yang, and H. . Liang. “Band-Notched Split-Ring Resonators Loaded Monopole Antenna for Ultrawideband Applications”. Applied Computational Electromagnetics Society Journal (ACES), vol. 28, no. 02, Oct. 2021, pp. 137-42, https://journals.riverpublishers.com/index.php/ACES/article/view/11681.