1597 20160222141731.0 SISMOimport-113 Yaneva, Marlena 2004 Geological records for paleoseismicity of Popovitsa Fault in a trench near Popovitsa, Southern Bulgaria Radulov, Alexander Nikolov, Gabriel Shanov, Stefan Camelbeeck, Thierry Nikolov, Nikolai Mitev, Asen Kostov, Konstantin Vanneste, Kris Verbeeck, Koen Proceedings of the Annual Scientific Conference of the Bulgarian Geological Society, Sofia 2004 107-109 published in NONREF