Pedzisa mashoko anotevera: Maererano naProcopius ("De Aedificiis", 4.3.5), Demetrias akavakwazve naJustinian I (r. 527<unk>565), asi humwe uchapupu hunonongedzera kukwaniso yokuti "upenyu hwakare hwomumaguta hungave hwakanga hwatoguma pakuvamba kwezana ramakore rechi6" (T.E. Gregory). Demetrias anotaurwa naHierocles muzana ramakore rechitanhatu. Nharaunda yayo yakagadziriswa nedzinza reSlavic reBelegezitai muzana ramakore rechinomwe / rechisere, rakapambwa nekupambwa nemaSaracen muna 901/2, uye nevapanduki panguva ye
Kumuka kwaPeter Delyan muna 1040.