1. Bassin, C., Laske, G., and Masters, G., The current limits of resolution for surface wave tomography in North America, EOS, Trans. Am. Geophys. Union, 2000, vol. 81, F897. http://igppweb.ucsd.edu/~gabi/crust2.html.
2. Botev, E.A., Burmakov, Ju.A., Treussov, A.V., et al., Crust and upper-mantle in homogeneities beneath the central part of the Balkan region, Phys. Earth Planet. Int., 1988, vol. 51, pp. 198–210.
3. Bouman, J., Ebbing, J., Meekes, S., Abdul Fattah, R., et al., GOCE gravity gradient data for lithospheric modeling, Int. J. Appl. Earth Obs. Geoinf., 2015, vol. 35, pp. 16–30.
4. Burchfiel, B.C., Nakov, R., Dumurdzanov, N., et al., Evolution and dynamics of the Cenozoic tectonics of the South Balkan extensional system, Geosphere, 2008, vols. 4–6, pp. 919–938.
5. Cammarano, F. and Guerri, M., Global thermal models of the lithosphere, Geophys. J. Int., 2017, vol. 210, pp. 56–72.