“CALCAREOUS NANNOFOSSIL: THE KEY TO REVEAL THE RELATIONS BETWEEN THE MACIGNO AND MONTE MODINO SANDSTONE, TWO WIDESPREAD CLASTIC WEDGES OF THE NORTHERN APENNINES”. RIVISTA ITALIANA DI PALEONTOLOGIA E STRATIGRAFIA , vol. 115, no. 2, July 2009, https://doi.org/10.13130/2039-4942/6381.