Weikang Yu, Hu Yang, Shengguo Li, and Yanlin Xu. “A Direct Solver Based on Rank-Structured Matrix for Large Arrays in Method of Moment”. The Applied Computational Electromagnetics Society Journal (ACES), vol. 33, no. 04, July 2021, pp. 464-7, https://journals.riverpublishers.com/index.php/ACES/article/view/9197.