@article {Cvetkova1979, title = {Probl{\`e}mes de la nationalit{\'e} bulgare pendant les {XVe{\textendash}XVIIe} s.}, journal = {Palaeobulgarica / Старобългаристика}, volume = {3}, year = {1979}, pages = {13{\textendash}25}, author = {Cvetkova, Bistra} }