Izmajlov, I. L. (2022). Srednevekovye bulgary: Stanovlenie ėtnopollitičeskoj obščnosti v VIII-pervoj treti XIII veka = Medieval Bulgars = the formation of an ethnopolitical community in the VIII-first third of the XIII century. Institut istorii im. Š. Mardžani.
Chicago-Zitierstil (17. Ausg.)Izmajlov, Iskander Lerunovič. Srednevekovye Bulgary: Stanovlenie ėtnopollitičeskoj Obščnosti V VIII-pervoj Treti XIII Veka = Medieval Bulgars = the Formation of an Ethnopolitical Community in the VIII-first Third of the XIII Century. Kazanʹ: Institut istorii im. Š. Mardžani, 2022.
MLA-Zitierstil (9. Ausg.)Izmajlov, Iskander Lerunovič. Srednevekovye Bulgary: Stanovlenie ėtnopollitičeskoj Obščnosti V VIII-pervoj Treti XIII Veka = Medieval Bulgars = the Formation of an Ethnopolitical Community in the VIII-first Third of the XIII Century. Institut istorii im. Š. Mardžani, 2022.