Nina Gagova, Vladeteli i knigi. Učastieto na južnoslovianskija vladetel v proizvodstvoto i upotrebata na knigi prez Srednovekovieto (IX–XV v.): recepcijata na vizantijskija model, Izdatelstvo „PAM Păblišing Kămpani” OOD, Sofija 2010, ss. 337 (Istorija i knižnina).

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