Φουμέλης Μ., and Βασιλάκης Ε. “DEVIATION BETWEEN HILL SLOPE ESTIMATION METHODS AND THE ROLE OF DEM SPATIAL RESOLUTION. COMPARATIVE STUDY IN A GIS ENVIRONMENT”. Bulletin of the Geological Society of Greece, vol. 36, no. 2, July 2018, pp. 894-03, doi:10.12681/bgsg.16839.