Christensen, O.F., Diggle, P.J. and Ribeiro Jr, P.J. (2001) Analysing positive-valued spatial data: the transformed Gaussian model. In Monestiez, P., Allard, D. and Froidevaux (eds), GeoENV III - Geostatistics for environmental applications. Quantitative Geology and Geostatistics, Kluwer Series, 11, 287--298.