Chrzan, Tadeusz. “Problems With Reclamation of Acid Lakes in the Area of Muzakow Lakes”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (June 20, 1999): 13–18. Accessed April 27, 2024. https://journals.ru.lv/index.php/ETR/article/view/1915.