1. Ammonite biostratigraphy, lithofacies variations, and paleoceanographic implications for Barremian-Aptian sequences of northeastern Mexico;Barragán,2000
2. Sedimentological and paleoecological aspects of the Aptian transgressive event of Sierra del Rosario, Durango, northeast Mexico;Barragán;Journal of South American Earth Sciences,2001
3. Towards a standard ammonite zonation for the Aptian (Lower Cretaceous) of northern Mexico;Barragán-Manzo;Revista Mexicana de Ciencias Geológicas,2005
4. Lower Aptian (Lower Cretaceous) ammonites from the basal strata of the La Peña Formation of Nuevo León State, northeast Mexico: biochronostratigraphic implications;Barragán;Revista Mexicana de Ciencias Geológicas,2008
5. Aptian ammonites from Mazapil, Zacatecas State (north-central Mexico) studied by Burckhardt in 1906: A revision;Barragán;Carnets de Geologie-Notebooks on Geology,2016