RT Article T1 The Revolt of Vitalianus and the “Scythian Controversy” JF Byzantinische Zeitschrift VO 101 IS 2 SP 773 OP 785 A1 Ruscu, Dan LA English PB De Gruyter YR 2009 UL https://ixtheo.de/Record/1780291329 DO 10.1515/BYZS.2008.024