2007. NEW EUROPEAN RECORDS AND FIRST EVIDENCE OF EPIDERMAL STRUCTURES OF SLOANEA L. FROM THE ITALIAN OLIGOCENE – REVISED TYPE AND ORIGINAL MATERIAL OF PRINCIPI 1916. Rivista italiana di Paleontologia e Stratigrafia. 113, 3 (nov. 2007). DOI:https://doi.org/10.13130/2039-4942/5882.