Malischewsky, P. G.; Zaslavsky, Y.; Gorstein, M.; Pinsky, V.; Tran, T. T.; Scherbaum, F.; Flores Estrella, H. Some New Theoretical Considerations about the Ellipticity of Rayleigh Waves in the Light of Site-Effect Studies in Israel and Mexico. Geofis Int 2010, 49, 141-152.