PASTARUS, Jyri-Rivaldo. IMPROVED UNDERGROUND MINING DESIGN METHOD FOR ESTONIAN OIL SHALE DEPOSIT. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 1, p. 270–274, 2005. DOI: 10.17770/etr2005vol1.2140. Disponível em: https://journals.ru.lv/index.php/ETR/article/view/2140.. Acesso em: 12 dec. 2024.