Simeonova Bŭlgarii︠a︡ v istorii︠a︡ta na evropeĭskii︠a︡ i︠u︡goiztok = Emperor Symeon's Bulgaria in the history of Europe's South-EastAngel N. Nikolov, Nikolaĭ Angelov Kŭnev · First published 2018Open the Tome
Rusii︠a︡, Aton i Rilskii︠a︡t Manastir (XI-nachaloto na XX v.)Angel N. Nikolov, Tina Georgieva, Ĭoanna Bencheva · First published 2016Open the Tome
Srednovekovnii︠a︡t bŭlgarin i "drugite"Petŭr Angelov, Angel N. Nikolov, Georgi N. Nikolov · First published 2013Open the Tome
