Numizmatični danni za datirane opožarjavaneto na Odesos po vremeto na imperator Iraklij. (Numismatical data about the time when during the Reign of Emperor Heraclius Odessos was burned down) - Lazarenko, Igor (Izvestija na Narodnija Muzej - Varna, 34/35 (1998/99), 1998)