Erg, K., E. Reinsalu, and I. Valgma. “GEOTECHNICAL PROCESSES AND SOIL-WATER MOVEMENT WITH TRANSPORT OF POLLUTANTS IN THE ESTONIAN OIL SHALE MINING AREA”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (June 26, 2006): 79–84. Accessed December 22, 2024. https://journals.ru.lv/index.php/ETR/article/view/1984.