1. The Jurassic–Cretaceous boundary in Northeastern Mexico. Confrontation and correlations by microfacies, clay minerals mineralogy, calpionellids and ammonites;Adatte;Geobios,1994
2. Paleoceanographic changes at the Jurassic–Cretaceous boundary in the Western Tethys, northeastern Mexico;Adatte;Cretaceous Research,1996
3. Standard calpionellid zonation (upper Tithonian–Valanginian) of the Western Mediterranean Province;Allemann,1971
4. The Berriasian of Caravaca (Province of Murcia) in the Subbetic zone of Spain and its importance for defining this stage and the Jurassic–Cretaceous boundary;Allemann;Mémoires du Bureau de Recherches Géologiques et Minieres,1975
5. Calpionellid zonation in north–Western Anatolia (Turkey) and calibration of the stratigraphic ranges of some benthic Foraminifera at the Jurassic/Cretaceous boundary;Altiner;Geologica Romana,1991