| BONI C., TARRAGONI C., MARTARELLI L. (2010) – Experimental hydrogeological cartography in the north-western sector of the Monti Sibillini (Marche). Mem. Descr. Carta Geol. d’It. LXXXI (2008), pp. 89-114, figg. 6, tabb. 8 |  |
| BONI C., TARRAGONI C., MARTARELLI L. (2010) – Experimental hydrogeological cartography in the north-western sector of the Monti Sibillini (Marche). Mem. Descr. Carta Geol. d’It. LXXXI (2008), pp. 89-114, figg. 6, tabb. 8 | |