Teirumnieka, Ērika, Ilmārs Kangro, Edmunds Teirumnieks, and Harijs Kalis. 2015. “The Analytical Solution of the 3D Model With Robin’s Boundary Conditions for 2 Peat Layers”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 3 (June): 186-92. https://doi.org/10.17770/etr2015vol3.618.