I am so sorry, i have to move this subject from the political area, here at english forum as a part of International area.
About your question ,i have to read that article and came with a point of vue.
All i know, and i can say at this moment ,is that the slavic population on bulgarian territory, had been preceded by other ancient population from the family of the tracic tribes ,wich are our ancestors also. Even more, there is a part of Bulgaria in now days, named "Quadrilater" or Southern Dobruja witch was in fact romanian territory from 1913 to 1940, bulgarian territory from 1878 to 1913, and controled by the turks before 1878, but often disputed by the romanians.
You can trust me, that is the essence of the post from Oliver Twist, the part in romanian i mean.