MINING BLOCK STABILITY ANALYSIS IN ESTONIAN OIL SHALE MINES BY STATISTICAL METHODS. ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference, [S. l.], v. 1, p. 132–138, 2001. DOI: 10.17770/etr2001vol1.1931. Disponível em: https://archive-journals.rtu.lv/etr/article/view/3507.. Acesso em: 11 mar. 2026.