Tikhonravov, A., Trubetskov, M., Winfree, N., Reshetnyak, M., & Steffen, B. (2006). Numerical solution of boundary value problems for the radiation transfer equation in an optical range. Numerical Methods and Programming (Vychislitel’nye Metody I Programmirovanie), 7(7), 85–92. Retrieved from https://en.num-meth.ru/index.php/journal/article/view/188