1. Carr, D., Olsen, A., and White, D., 1992, Hexagon mosaic maps for display of univariate and bivariate geographical data: Cartogr. Geogr. Inf. Syst., v. 19, p. 228–236.
2. Church, B., Medling, E., and Brady, D., 1975, A different look at area 13 FIDLER survey data.in M. White and P. Dunaway (Eds.).The Radioecology of Plutonium and Other Transuranics in Desert Environments: USERDA Report, NVO-153, p. 231–235.
3. Clark, I., Basinger, K., and Harper, W., 1987, MUCK—A novel approach to cokriging,in B. Buxton (Ed.),Proceedings of the Conference on Geostatstical, Sensitivity, and Uncertainty Methods for Ground-Water Flow and Radionuclide Transport Modeling: Battelle Press, Columbus, p. 473–493.
4. Cressie, N., 1991,Statistics for Spatial Data: Wiley, New York.
5. Cressie, N., 1985, Fitting variogram models by weighted least squares: Math. Geol., v. 17, p. 563–586.