Knyazkov, D.Yu. “Efficient Numerical Methods for the Analysis of Electromagnetic Fields”. Numerical Methods and Programming (Vychislitel’nye Metody i Programmirovanie) 13, no. 31 (March 30, 2012): 263–270. Accessed April 29, 2024. https://en.num-meth.ru/index.php/journal/article/view/519.