, Proposal for a directive of the European Parliament and of the Council. Establishing a Framework for the Protection of Soil and Amending Directive, European Communities, p.232, 2004.

D. M. Hawkins and N. Cressie, Robust kriging -A proposal, Journal of the International Association for Mathematical Geology, vol.16, pp.3-18, 1984.

R. M. Lark, Modelling complex soil properties as contaminated regionalized variables, Geoderma, vol.106, pp.799-813, 2002.

R. M. Lark and B. R. Cullis, Model based analysis using REML for inference from systematically sampled data on soil, European Journal of Soil Science, vol.55, pp.799-813, 2004.

B. G. Rawlins, R. M. Lark, R. Webster, and K. E. O'donnell, The use of soil survey data to determine the magnitude and extent of historic metal deposition related to atmospheric smelter emissions across Humberside, UK. Environmental Pollution, vol.143, pp.416-426, 2006.

J. Thioulouse, C. Chessel, and S. Champely, Multivariate analysis of spatial patterns: a unified approach to local and global structure, Environmental and Ecological Statistics, vol.2, pp.1-14, 1995.