Pandeli, E.; Corti, S.; Franceschelli, M.; Pecchioni, E. THE VARICOLOURED SLATES OF THE GRÀSSERA UNIT (CENTRAL-EASTERN ELBA, TUSCANY): PETROGRAPHICAL-MINERALOGICAL DATA AND COMPARISONS WITH OTHER TUSCAN AND LIGURIAN-PIEDMONTESE UNITS. Ofioliti 2007, 26, 197-206.