Villegas, D. D., F. X. Pereyra, A. M. Viaggio, and J. A. Ferrer. “Occurrence of Pyroclastic Material in Soils of Three Sectors of Western Santa Cruz”. Revista De La Asociación Geológica Argentina, vol. 64, no. 2, Apr. 2009, pp. 303-11, https://revista.geologica.org.ar/raga/article/view/1283.