Skianis, G.A. and Vaiopoulos, A.D. 2013. Mapping hydrothermal alteration zones from spectral band ratios: a geostatistical approach based on the stable semivariogram model. Bulletin of the Geological Society of Greece. 47, 4 (Jan. 2013), 1949–1958. DOI:https://doi.org/10.12681/bgsg.11000.