González-Gutiérrez, Rosa Blanca, Javier Santos-González, João Antonio Santos, Martín Cano, Jeffrey Reed Irwin, Amelia Gómez-Villar, and José María Redondo-Vega. 2019. “Glacial Geomorphology of the Sancenas Karst Massif (Cantabrian Mountains, Northern Spain)”. Geografia Fisica E Dinamica Quaternaria 42 (1): 71-86. https://doi.org/10.4461/GFDQ.2019.42.6.