Castillo, Miguel, and Esperanza Muñoz-Salinas. 2014. “Assessing the Impact of Quaternary Glaciations on the Topography of Sierra De Gredos (central Spain)”. Revista Mexicana De Ciencias Geológicas 30 (2). https://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/118.