SPECIAL HPERBOLIC TYPE APPROXIMATION FOR SOLVING OF 3-D TWO LAYER STATIONARY DIFFUSION PROBLEM. ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference, [S. l.], v. 3, p. 95–100, 2019. DOI: 10.17770/etr2019vol3.4079. Disponível em: https://archive-journals.rtu.lv/etr/article/view/4364.. Acesso em: 11 mar. 2026.