«A GUIDE-LEVEL OF THE UPPERMOST HAUTERIVIAN (LOWER CRETACEOUS) IN THE PELAGIC SUCCESSION OF UMBRIA-MARCHE APENNINES (CENTRAL ITALY): THE FARAONI LEVEL». 1993. Rivista italiana di Paleontologia e Stratigrafia 99 (4). https://doi.org/10.13130/2039-4942/8897.