Vasilev, Atanas, Kozhuharov, Emanuil. "SEISMICITY AND MUD VOLCANISM: BLACK SEA, BULGARIA." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; SGEM2012 12th International Multidisciplinary Scientific GeoConference, 2012, pp. 987 - 992 pp. https://doi.org/10.5593/sgem2012/s14.v3008