  This study defines a 3D shear-wave velocity model to the depth of about 350
km in the region of Balkan Peninsula by application of several methods and
tools: collection of surface-wave dispersion measurements; tomography on a grid
sized 1 degree by 1 degree; non-linear inversion of dispersion relations; local
smoothing optimization; and juxtaposition of representative cellular models.
This study upgrades, refines and extends the results obtained for the region by
Raykova and Panza (2006), Raykova and Nikolova (2007), Panza et al. (2007) and
Brandmayr et al. (2010).
