Weighted sample variograms as a tool to better assess the spatial variability of soil properties, Geoderma, vol.140, issue.1-2, pp.81-89, 2007. ,
DOI : 10.1016/j.geoderma.2007.03.002
Maximum likelihood parameter estimation of hydrologic spatial processes by the Gauss-Newton method, Journal of Hydrology, vol.79, issue.1-2, pp.53-71, 1985. ,
DOI : 10.1016/0022-1694(85)90181-7