Bonnard, Charles, and L. Vulliet. "Management of Risks from Large Landslides: The Problems of Acceptable and Residual Risks." in Coping with Risks due to Natural Hazards in the 21st Century. Ammann, Dannenmann, and Vulliet, eds. London: Taylor & Francis Group, 2006.

Bonnard, Charles, and L. Vulliet. "Management of Risks from Large Landslides: The Problems of Acceptable and Residual Risks." in Coping with Risks due to Natural Hazards in the 21st Century. Ammann, Dannenmann, and Vulliet, eds. London: Taylor & Francis Group, 2006.