1. Alonso, E.E. and Krizek, R.J. (1975), Stochastic Formulation of Soil Properties, Proceedings, 2nd International Conference on Application of Statistics and Probability in Soil and Structural Engineering, Aachen, Germany, Vol. 1, pp. 9–32.
2. Baecher, G.B. (1984), Need for Probabilistic Characterization (Just a few more tests and we’ll be sure!), Proceedings, Symposium on Probabilistic Characterization of Soil Properties, Atlanta, ASCE, pp. 1–18.
3. Bolle, A. (1988), Approche probabiliste en mécanique des sols avec prise en compte de la variabilité spatiale, Thèse de doctorat ès sciences techniques No 743, Swiss Federal Institute of Technology, Lausanne, Switzerland.
4. Bolle, A. (1993), How to Manage the Spatial Variability of Natural Soils, in this book.
5. Breysse, D. (1993), Failure and Probabilities at Various Scales. A Synthesis Paper, in this book.