Pravoslavnite horovi tvorbi na protojerej Kiril Popov - čast ot s''vremennoto razvitie na tradicičâta na iztočnoto c''rkovno peene v B''lgariâ : muzikalno-strukturen i idejno-obrazen dirigentski analiz = The orthodox choral works of archpriest Kiril Popov - a part of the contemporary development of the tradition of Eastern Church chant in Bulgaria : structural and musical analysis of the ideas and images from the standpoint of the conductor / ot Rosica Nikolova ; [eng. transl. Alexander Gospodinov]. - Nikolova, Rosica (1975- ). (Sinodalno Izdatelstvo, 2012)