K istorii Preslavskoj knižnoj školy fragment sočinenija Irineja Lionskogo Protiv eresej i statʹja Protiv arian Grigorija Bogoslova v Izbornike 1073 goda = To the history of Preslav literary school : a fragment of the treatise of Irenaeus of Lyon Against Heresies and the article Against the Arians by Gregory the Theologian in the Izbornik 1073 - Afanasʹeva, Tatʹjana Igorevna 1965- (2021)