Fik, V., Y. Paltov, and Y. Kryvko. “Electronic Microscopic Research on Periodont in Experimental Two-Weight Opioid Action and After Its over for Four Weeks”. Reports of Morphology, Vol. 25, no. 3, Sept. 2019, pp. 27-32, doi:10.31393/morphology-journal-2019-25(3)-05.