Delpino, S., G. Ferracutti, J. Kostadinoff, and E. Bjerg. “The Southern Extension of the Sierras Pampeanas in La Pampa Province: Geological and Geophysical Evidences”. Revista De La Asociación Geológica Argentina, vol. 60, no. 3, Sept. 2005, pp. 535-51, https://revista.geologica.org.ar/raga/article/view/1114.