An R package for spatial coverage sampling and random sampling from compact geographical strata by k-means. - Dennis J. J. Walvoort; D. J. Brus; J. J. de Gruijter (Comput. Geosci., 2010)

Effects of spatial pattern persistence on the performance of sampling designs for regional trend monitoring analyzed by simulation of space-time fields. - D. J. Brus; J. J. de Gruijter (Comput. Geosci., 2013)