Reference

Fred Rögl (1985): Late Oligocene and Miocene planktic foraminifera of the Central Paratethys. In: Bolli, H. M., Saunders, J. B. & Perch-Nielsen, K. (eds.): Plankton stratigraphy, v. 1 (Planktic foraminifera, calcareous nannofossils and calpionellids) – Arch. Hydrobiol./Suppl. 57 – : 315 - 328.