Kangro, Ilmārs, Harijs Kalis, Ērika Teirumnieka, and Edmunds Teirumnieks. “SPECIAL HPERBOLIC TYPE APPROXIMATION FOR SOLVING OF 3-D TWO LAYER STATIONARY DIFFUSION PROBLEM”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 3 (June 20, 2019): 95–100. Accessed December 13, 2024. https://journals23.rta.lv/index.php/ETR/article/view/4079.