Dai, Guoxiang, Xiaofei Xu, and Xiao Deng. “Size-Reduced Equilateral Triangular Metamaterial Patch Antenna Designed for Mobile Communications”. The Applied Computational Electromagnetics Society Journal (ACES) 36, no. 08 (October 21, 2021): 1026–1030. Accessed April 16, 2024. https://journals.riverpublishers.com/index.php/ACES/article/view/11767.