@ARTICLE{Bert_Didier_Palaeontology,_2013,
 author={Bert, Didier and Bersac, Stéphane and Delanoy, Gérard and Canut, Léon},
 volume={vol. 63},
 number={No 3},
 journal={Acta Geologica Polonica},
 howpublished={online},
 year={2013},
 publisher={Komitet Nauk Geologicznych PAN},
 publisher={Wydział Geologii UW},
 title={Palaeontology, taxonomic revision and variability of some species of the genus Gassendiceras Bert et al., 2006 (Ammonitina, Upper Barremian) from southeastern Franc},
 URL={http://www.journals.pan.pl/Content/81914/PDF/03bert.pdf},
 doi={10.2478/agp–2013–0016},
}