1. Koukis G, Tsiambaos G, Sabatakakis N. Slope movements in the Greek territory: a statistical approach. In: Proceedings of the 7th international IAEG congress. p. 4621–8.
2. Principles of engineering geology;Attewell,1976
3. Descoeudres F, Zimmermann TH. Three-dimensional dynamic calculation of rockfalls. In: Proceedings of the 6th international congress on rock mechanics. p. 337–42.
4. Impact: the theory and physical behavior of colliding solids;Goldsmith,1960
5. A coefficient of restitution of rock materials;Imre;Comput Geosci,2008