Sublevel Mining System with Artificial Pillars Made of a Hardening Backfills for The Development of Veins in Difficult Geomechanical Conditions. Texas Journal of Multidisciplinary Studies, USA, v. 3, p. 98–104, 2021. Disponível em: https://mail.zienjournals.com/index.php/tjm/article/view/394. Acesso em: 16 aug. 2026.