Gradŭt v Trakii︠a︡ i Dakii︠a︡ prez kŭsnata antichnost, IV-VI v.Velizar Iv Velkov · First published 1959Open the Tome
Izvori za istorii︠a︡ta na Trakii︠a︡ i trakite = Fontes historiae Thraciae thracumqueVelizar Iv Velkov · First published 1981Open the Tome
Robstvoto v Trakii͡a︡ i Mizii͡a︡ prez antichnosttaVelizar Iv Velkov · First published 1967Open the Tome
Die Thrakische und Dakische Stadt in der Spätantike, 4.-6. jhVelizar Iv Velkov · First published 1959Open the Tome
