Fig. 8From: Towards sustainable management of forest residues in the southern Apennine Mediterranean mountain forests: a scenario-based approachGap statistic (k) curve for standardized attributes of the public forest parcels of the Basilicata region. Black points represent k statistics and whiskers the corresponding standard error (SE). Dotted green line indicates the optimal number of clusters according to “firstSEmax” criteria with a SE factor equal to 1Back to article page