00588naa#a2200181#i#450# EN\\bibl\45439 20240429215227.1 2071-7318 20211119b2021####ek#y0engy0150####ca RU TO THE QUESTION OF STUDING UNDERGROUND ARCHITECTURE OF CHRISTIANITY Journal article Belgorod Belgorod State Technological University named after V.G. Shukhov 2021 8 с. Journal article local Архитектура. 72 Borisov Sergei Vladimirovich Ragulina A. V. naukaru.ru