1. Stratigraphic significance of some oligosteginid assemblages from Lurestan Province, northwest Iran;Adams;Micropaleontology,1967
2. Cenomanian–Coniacian zonation (foraminifers and calcareous algae) in the Guerrero–Morelos basin, southern Mexico;Aguilera-Franco;Revista Mexicana de Ciencias Geológicas,2003
3. Pithonella ovalis from the early Cenomanian of England;Banner;Micropaleontology,1972
4. Cretaceous Pithonella from Israel;Bein;Micropaleontology,1976
5. New biostratigraphic data for the Chikkim Formation (Cretaceous, Tethyan Himalaya, India);Bertle;Cretaceous Research,2005