Institution: | Geophysical Institute, Bulgarian Academy of Sciences, b1.3, Acad. Bonchev Str., 1113 Sojia, Bulgaria;Institut de Ciencies de la Terra, CSIC, Marti i Franques s/n, 08028 Barcelona, Spain;University of Sojia, Dept. of Geophysics, 5, James Baucher Str., 1126 Sofia. Bulgaria |