2007. THANETIAN AND EARLY YPRESIAN ORTHOPHRAGMINES (FORAMINIFERA: DISCOCYCLINIDAE AND ORBITOCLYPEIDAE) FROM THE CENTRAL WESTERN TETHYS (TURKEY, ITALY AND BULGARIA) AND THEIR REVISED TAXONOMY AND BIOSTRATIGRAPHY. RIVISTA ITALIANA DI PALEONTOLOGIA E STRATIGRAFIA . 113, 3 (Nov. 2007). DOI:https://doi.org/10.13130/2039-4942/5884.