Salazar, Luis, Fabián Hoyos, Oscar Echeverri, and Edgar Hincapié. “Laboratory Rainfall-Induced Slope Failure in a Soil from the Colombian Coffee Region”. AUC Geographica 54, no. 1 (May 20, 2019): 48-56. Accessed September 19, 2019. http://aucgeographica.cz/index.php/aucg/article/view/104.