Analysis of factors and suggestions for improving labour productivity in underground metal mines. Journal of Mining and Geosciences, [S. l.], v. 1, n. 1, p. 1–5, 2022. DOI: 10.52493/j.jaab.2022.1.1.56. Disponível em: https://glintplus.com/j/jmg/article/view/56. Acesso em: 13 oct. 2026.