DOLCHINKOV, Nikolay; BOYANOVA, Yanitsa; NICHEV, Nikolay. URANIUM MINES IN BULGARIA - ANALYSIS OF THE STATE 30 YEARS AFTER THEIR CLOSURE. ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 1, p. 123–129, 2024. DOI: 10.17770/etr2024vol1.8002. Disponível em: https://journals.ru.lv/index.php/ETR/article/view/8002.. Acesso em: 7 apr. 2025.