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2. Aguado, R. 1993, Nannofósiles del Cretácico de la Cordillera Bética (sur de España), Universidad de Granada, Granada
3. Aguado, R. Company, M. Tavera, J. M. 1995, Considerations about the Berriasian–Valanginian boundary in SE Spain, Abstract Volume, Second International Symposium on Cretaceous Stage Boundaries, Brussels, 1995
4. Standard calpionellid zonation (Upper Tithonian–Valanginian) of the Western Mediterranean province;Allemann,1971
5. The Berriasian of Caravaca (Prov. of Murcia) in the subbetic zone of Spain and its importance for defining this stage and the Jurassic–Cretaceous boundary;Allemann;Colloque sur la limite Jurassique-Crétacé, Lyon-Neuchâtel, 1973. Mémoires du Bureau de Recherches Géologiques et Minières,1975