Martynenko, S.I. “Robust Multigrid Technique for Solving Partial Differential Equations on Structured Grids”. Numerical Methods and Programming (Vychislitel’nye Metody i Programmirovanie) 1, no. 1 (May 28, 2000): 83–102. Accessed April 30, 2024. https://en.num-meth.ru/index.php/journal/article/view/7.