The 'Аct' of archbishop Serafim (Samoilovich) and polemic in the circle of his intimates in 1933‒1934 concerning his stance - Sergey Nikolaev (Vestnik Pravoslavnogo Svâto-Tihonovskogo Gumanitarnogo Universiteta: Seriâ II. Istoriâ, Istoriâ Russkoj Pravoslavnoj Cerkvi, 2019)