J. C. M. de Coo, J. C. Deelman, and D. van der Baan. “Carbonate Facies of the Santa Lucía Formation (Emsian-Couvinian) in León and Asturias, Spain”. Netherlands Journal of Geosciences (January 1, 1971): 359-366. Accessed August 31, 2026. https://njgjournal.nl/index.php/njg/article/view/14841.