ELEZ VILLAR, J.; GONZALO CORRAL, F. J. Summary of the global graphite market and the prospectives for the spanish deposits. Boletín Geológico y Minero, [S. l.], v. 130, n. 1, p. 27–46, 2019. DOI: 10.21701/bolgeomin.130.1.002. Disponível em: https://bgm.revistas.csic.es/index.php/bgm/article/view/210. Acesso em: 3 may. 2025.