1. R. Baker and M. Garber, "Theoretical analysis of the stability of slopes," Geotechnique, 28(4), 395-411 (1978).
2. L. A. Pierson, S. A. Davis, and R. Van Vickle, "Rockfall Hazard Rating System: Implementation Manual," Hazards (1990).
3. A. Cancelli and G. Crosta, "Hazard and risk assessment in rockfall prone areas," Risk and Reliability in Ground Engineering, Vol. 15, B. O. Skipp, ed., ASCE (1993).
4. A. Azzoni, G. L. Barbera, and A. Zaninetti, "Analysis and prediction of rockfalls using a mathematical model," Int. J. Rock Mech. Min. Sci., 32(7), 709-724 (1995).
5. G. Crosta and P. Frattini, "Rainfall thresholds for the triggering of soil slips and debris flows," Conference on Mediterranean Storms (2001).