Olivero, E. B., F. A. Medina, and M. I. Lopez C. “ The Stratigraphy of Cretaceous Mudstones in the Eastern Fuegian Andes: New Data from Body and Trace Fossils”. Revista De La Asociación Geológica Argentina, vol. 64, no. 1, Mar. 2009, pp. 60-69, https://revista.geologica.org.ar/raga/article/view/1295.