Einstein, H.H., and Sousa, R.L. (2012). Risk in Slopes. In L. Ribeiro e Sousa, E. Vargas Jr., M.M. Fernandes, R. Azevedo (eds.): Innovative Numerical Modelling in Geomechanics, Chapter 11, 201-210. CRC Press, 2012. ISBN 9780415616614