1. Adamson, A. W.: 1990, Physical Chemistry of Surfaces, 5th. edn. Wiley-Interscience, New York, pp. 777.
2. Ahuja, L. R., Naney, J. W. and Williams, R. D.: 1985, ‘Estimating soil water characteristics from simpler properties or limited data’, Soil Sci. Soc. Am. J. 49, 1100–1105.
3. Anderson, W. G.: 1987, ‘The effect of wettability on capillary pressure, Wettability Literature Survey 4’, J. Pet. Technol. 39, 1283–1300.
4. Arya, L. M., Leij, F. J. and van Genuchten, M. Th.: 1999, ‘Relationship between particle-size distribution and soil water retention’, in M.Th. van Genuchten (ed.), Characterization and Measurement of the Hydraulic Properties of Unsaturated Porous Media, International Workshop Riverside, CA, Oct 22–24, 1997; U.S. Salinity Laboratory, USDA: Riverside, CA, pp. 931–946.
5. Bradford, S. A. and Leij, F. J.: 1995, ‘Wettability effects on scaling two- and three-fluid capillary pressure-saturation relations’, Environ. Sci. Technol. 29, 1446–1455.