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2. Foraminiferi padani. AGIP S.p.A., 2da edizione, San Donato Milanese, 52 pl,1982
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4. A Revised Cenozoic Geochronology and Chronostratigraphy;Berggren,1995
5. First record of Borelis melo and Dendritina sp. in the Messinian of SE Spain (Cabo de Gata, Province Almeria);Betzler;Paläontologische Zeitschrift, Stuttgart,1997