 Pedzisa mutsara unotevera: Kupandukira kwaGeorgi Voyteh , - Slav Kupandukira muPomoravlje kwaive kupandukira kweBulgaria muByzantine theme yeBulgaria muna 1072. Yakanga iri nhamburiko huru yechipiri yokudzorera Umambo hweBulgaria pashure peKumuka kwaPeter Delyan muna 1040-1041. 