I just draw new maps See them here and However I left Ahtum as independent ruler as he is also shown on this map of Euratlas On that map Srem Bosnia Ra ka Duklja etc are all shown as part of Bulgarian Empire but Voivodship of Ahtum is shown separatelly as well as Duchy of Gyula I agree that Ahtum s role can be explained by the situation in Bulgaria in the early 11th but still we should rather define him as ally instead of vassal of Bulgarian Empire Also Salan was descendant of Bulgarian ruler which conquered land between Danube and Tisa thus he rather gained land that he ruled by heritage instead that he was appointed by the tsar Regarding article on Serbian Wikipedia you should know that we lived in the same state with Macedonians for long time and that Serbian historical books are no different than Macedonian when they speak about Samuil I do not see big problem about this and if you ask me we can say that Samuil was both Bulgarian and Macedonian tsar as well as former Kievan Rus is part of history of all Russia Ukraine and Belarus