Chen, J. ., S. . Li, and Y. . Song. “Analysis of Electromagnetic Scattering Problems by Means of a VSIE-ODDM-MLFMA Method”. Applied Computational Electromagnetics Society Journal (ACES), vol. 27, no. 08, Dec. 2021, pp. 660-7, https://journals.riverpublishers.com/index.php/ACES/article/view/12627.