D’ARPA, C.; MELÉNDEZ, G. OXFORDIAN BIOSTRATIGRAPHY AND AMMONITE ASSOCIATIONS FROM WEST SICILY: BIOSTRATIGRAPHIC SUCCESSION OF GENUS <em>GREGORYCERAS</em> AND CORRELATION WITH TETHYAN PERISPHINCTID SCALE. RIVISTA ITALIANA DI PALEONTOLOGIA E STRATIGRAFIA , [S. l.], v. 110, n. 1, 2004. DOI: 10.13130/2039-4942/6296. Disponível em: https://riviste.unimi.it/index.php/RIPS/article/view/6296. Acesso em: 19 jan. 2025.