Starostenko, V.I., Burakhovich, T., Kushnir, A., Legostaeva, O.V., Tsvetkova, T., Sheremet, E.M. and Shumlyanskaya, L.A. 2013. The possible nature of the seismic activity of the depths of the Predobudruzhsky trough and the Northern Dobruja. Geofizicheskiy Zhurnal. 35, 1 (Feb. 2013), 61–74. DOI:https://doi.org/10.24028/gzh.0203-3100.v35i1.2013.116331.