@article{Borisov2021to,
author={Borisov, S.V. and Ragulina, A.V.},
title={TO THE QUESTION OF STUDING UNDERGROUND ARCHITECTURE  OF CHRISTIANITY},
journal={Bulletin of Belgorod State Technological University named after. V. G. Shukhov},
publisher={Belgorod State Technological University named after V.G. Shukhov},
year={2021},
pages={69-77},
volume={6},
issue={11},
}