Vattuone, M.E., and C.O. Latorre. 2004. “K/Ar Ages from East Nahuel Pan Hills, Chubut. Implicance in the Divisadero and Choiyoi Groups Correlation”. Revista De La Asociación Geológica Argentina 59 (3):510-13. https://revista.geologica.org.ar/raga/article/view/1457.