1. LOVE, A. E. H. Some Problems of Geo-dynamics, Cambridge University Press, London (1911)
2. BULLEN, K. E. The problem of the earth’s density variation. Bulletin of the Seismological Society of America, 30(3), 235–250 (1965)
3. SARI, C. and SALK, M. Analysis of gravity anomalies with hyperbolic density contrast: an application to the gravity data of western Anatolia. Journal of the Balkan Geophysical Society, 5(3), 87–96 (2002)
4. VARDOULAKIS, I. Torsional surface wave in inhomogeneous elastic media. International Journal for Numerical and Analytical Methods in Geomechanics, 8, 287–296 (1984)
5. MEISSNER, E. Elastic oberflachenwellen mit dispersion in einem inhomogeneous medium. Viertlagahrsschriftder Naturforschenden Gesellschaft, 66, 181–195 (1921)