Teirumnieks, Edmunds, Ērika Teirumnieka, Ilmārs Kangro, and Harijs Kalis. “THE MATHEMATICAL MODELING OF METALS CONTENT IN PEAT”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (August 3, 2015): 249–257. Accessed May 10, 2024. https://journals.ru.lv/index.php/ETR/article/view/1119.