4) Casagrande, A. (1936): ″Characteristics of cohesionless soils affecting the stability of slopes and earth fills,″ Journal of the Boston Society of Civil Engineering, January, pp. 13-32.
5) Casagrande, A. (1975): ″Liquefaction and cyclic deformation of sands-a critical review,″ Fifth Panamerican Conference on Soil Mechanics and Foundation Engineering, Buenos Aires, Argentina.