Viséan-Serpukhovian (Early Carboniferous) ammonoids from the alba formation, Esla Syncline, Cantabrian Mountains preliminary study. Zubía, [S. l.], n. 42, p. 19–24, 2024. DOI: 10.66737/ier.zub.11. Disponível em: https://www.publicacionesier.es/zubia/article/view/11. Acesso em: 16 jun. 2026.