Katica Drobne, Josep Serra-Kiel, Elena Zakrevskaya, Lukas Hottinger, Gyorgy Less, Josep Tosquella, Carles Ferrandez, Yvette Tambareau, Johannes Pignatti, Josep Maria Samso, Rajko Pavlovec, Anil Kumar Jauhri, Hans Schaub, Amin Strougo, Ercument Sirel, Esmeralda Caus,
Larger Foraminiferal Biostratigraphy of the Tethyan Paleocene and Eocene Bulletin De La Societe Geologique De France. ,vol. 169, pp. 281- 299 ,(1998)