Colombian SMEs in the coal mining sector: financial performance analysis (2014- 2019). In Vestigium Ire, [S. l.], v. 15, n. 1, p. 25–46, 2021. Disponível em: https://revistas.santototunja.edu.co/index.php/ivestigium/article/view/2371. Acesso em: 18 jul. 2026.