Treijs, J., E. Teirumnieks, V. Mironovs, V. Lapkovskis, and A. Shishkin. “Investigations of Properties of Powdered Ferromagnetic Sorbents”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (August 6, 2015): 95–100. Accessed May 9, 2024. https://journals.ru.lv/index.php/ETR/article/view/834.