van Loevezijn, G.B.S. and Raven, J.G.M. 2017. Frasnian carbonate shoals and sequence stratigraphy of the Upper Devonian series from the southern Cantabrian Mountains, northern Spain. Boletín Geológico y Minero. 128, 4 (Dec. 2017), 931–961. DOI:https://doi.org/10.21701/bolgeomin.128.4.004.