LONG-TERM STABILITY MONITORING OF THE MINING BLOCKS IN ESTONIAN OIL SHALE MINES. ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference, [S. l.], v. 1, p. 206–211, 2006. DOI: 10.17770/etr2003vol1.2008. Disponível em: https://archive-journals.rtu.lv/etr/article/view/3541.. Acesso em: 11 mar. 2026.