van Loevezijn, G. B. S., & 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), 931–961. https://doi.org/10.21701/bolgeomin.128.4.004