Julivert, M. “The Progress of Knowledge of the Geological Structure of the Northwest of the Iberian Peninsular until the Early 1970s”. Boletín Geológico y Minero 131, no. 4 (December 30, 2020): 661–693. Accessed May 3, 2025. https://bgm.revistas.csic.es/index.php/bgm/article/view/94.