van Loevezijn, Gerard B.S., and J.G.M. Raven. “Facies Patterns and Depositional Processes in Two Frasnian Mixed Siliciclastic-Carbonate Systems in the Cantabrian Mountains, Northwest Spain”. Geologos, vol. 26, no. 1, Apr. 2020, pp. 1-23, doi:10.2478/logos-2020-0001.