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2. Ammonoid intraspecific variability;Baets,2015
3. Lower Aptian (Lower Cretaceous) ammonites from the basal strata of the La Penba Formation of Nuevo Léon State, northeast Mexico: biochronostratigraphic implications;Barragán;Revista Mexicana de Ciencias Geológicas,2008
4. Ammonite biostratigraphy of two stratigraphic sections of the La Peña Formation (Aptian, Lower Cretaceous) in Nuevo León State, Northeast Mexico;Barragán;Cretaceous Research,2021
5. Characterisation of the organic matter of upper Bedoulian and lower Gargasian strata in the historical stratotypes (Apt and Cassis-la-Bédoule areas, SE France);Baudin,2008