@book{Mandra2021propedeutic,
author={Mandra, Y.V. and Griroriev, S.S. and Svetlakova, E.N. and Semencova, E.A. and Gegalina, N.M. and Vlasova, M.I. and Kotikova, A.Y. and Boldyrev, Y.A. and Ivashov, A.S. and Legkih, A.V.},
title={Propedeutic periodontics},
publisher={TIRAZH Publishing House},
year={2021},
pages={152},
}