{"id":"000432457","type":"article","title":"Deux forteresses byzantines du haut moyen âge en Bulgarie du Nord-Est. (Bulg.m.franz.Res.) -","pages":"18-31","container-title":"Archeologija. Organ na Archeologičeskija institut i muzej pri Bălgarskata akademija na naukite, 13,4.1971","author":[{"family":"Ovcharov","given":"D."}],"issued":{"raw":"1971"}}