Cossart, E., R. Perrier, M. Schwarz, and S. Houee. “Mapping Permafrost at a Regional Scale: Interpolation of Field Data by GIS Application in the Upper Durance Catchment (Southern French Alps)”. GeoFocus. International Review of Geographical Information Science and Technology, no. 8, Dec. 2008, pp. 205-24, https://geofocus.org/index.php/geofocus/article/view/144.