1999. THE BASAL COMPLEX STRATIGRAPHY OF THE HELMINTHOID MONTE CASSIO FLYSCH: A KEY TO THE EOALPINE TECTONICS OF THE NORTHERN APENNINES. RIVISTA ITALIANA DI PALEONTOLOGIA E STRATIGRAFIA . 105, 1 (Mar. 1999). DOI:https://doi.org/10.13130/2039-4942/5367.