Bogaert, P. (1998). Assessing the variability of the variogram estimator. GeoEnv II - Geostatistics for Environmental Applications, Gomez-Hernandez, Soares and Froidevaux - Kluwer Academic, Valence, Espagne, 479-490. https://hdl.handle.net/2078.5/152538 (Original work published 1998)