Makarov, S., A. Isaeva, E. Grachev, and M. Serdobolskaya. “Speedup of Computation When Solving the Nonhomogeneous Diffusion Equation by a Renormalization Method”. Numerical Methods and Programming (Vychislitel’nye Metody I Programmirovanie), vol. 13, no. 31, Mar. 2012, pp. 239-46, https://en.num-meth.ru/index.php/journal/article/view/516.