1. Phoon, K.-K., & Kulhawy, F. H. (1999). Characterization of geotechnical variability. Canadian Geotechnical Journal, 36, 612–624.
2. Phoon, K.-K. (2017). Role of reliability calculations in geotechnical design. Georisk, 11, 4–21.
3. Lacasse, S., Nadim, F., Rahim, A., & Guttormsen, T. R. (2007). Statistical description of characteristic soil properties. In Offshore Technology Conference.
4. Uzielli, M., Lacasse, S., Nadim, F., & Phoon K.-K. (2006). Soil variability analysis for geotechnical practice. In Proceedings of the 2nd International Workshop on Characterisation and Engineering Properties of Natural Soils, Singapore.
5. Orchant, C. J., Kulhawy, F. H., & Trautmann, C. H. (1988). Critical evaluation of in-situ test methods and their variability. Report EL-5507(2), Palo Alto.