Zvonariov С. 2025. «Russians and Bulgarians are One Orthodox Whole»: Relations Between the Russian and Bulgarian Orthodox Churches in the 1960s — Early 1970s: ОТНОШЕНИЯ РУССКОЙ И БОЛГАРСКОЙ ПРАВОСЛАВНЫХ ЦЕРКВЕЙ В 1960‑е — НАЧ. 1970-х гг. Theological Bulletin. 1 (56) (May 2025), 159–186.