Pulpudeva Seimanes philippopolitaines de l'histoire et de la culture thrace - Fol, A; Tăpkova-Zaimova, V; Vlahov, K; Mihailov, G; Danov, H; Čičikova, M; Tončeva, G; Popov, V; Venedikov, I (Editions de l'Academie Bulgare des Sciences., 1978)
Keywords: storia, cultura, Bulgaria