HIGGINS, A. Conodont biostratigraphy of the late Devonian - early Carboniferous rocks of the South Central Cantabrian Cordillera. Trabajos de Geología, [S. l.], v. 3, n. 3, p. 179–139, 1971. DOI: 10.17811/tdg.3.1971.179-139. Disponível em: https://reunido.uniovi.es/index.php/TDG/article/view/2674. Acesso em: 25 abr. 2024.