M. Marroni, L. Pandolfi, and N. Perilli, “CALCAREOUS NANNOFOSSIL DATING OF THE SAN MARTINO FORMATION FROM THE BALAGNE OPHIOLITE SEQUENCE (ALPINE CORSICA): COMPARISON WITH THE PALOMBINI SHALE OF THE NORTHERN APENNINE”, Ofioliti, vol. 25, no. 2, pp. 147-155, Jul. 2000.