1. A formal framework for database sampling;Bisbal;Information and Software Technology,2005
2. Brus, D.J., de Gruitjer, J., van Groeningen, J.W., in press. Chapter 14. Designing purposive and random spatial coverage samples by the K-means clustering algorithm. In: Lagacherie, P., McBratney, A.B., Voltz, M. (Eds.), Digital Soil Mapping: An Initial Perspective. Developments in Soil Science 31. Elsevier Amsterdam, 185–192.
3. Disaggregation of polygons of surficial geology and soil maps using spatial modeling and legacy data;Bui;Geoderma,2001
4. CORINE land cover update 2000;Büttner,2002
5. Sampling for Natural Resource Monitoring;de Gruijter,2006