Chornii, A., and V. V. Shmanko. “The Prevalence and Peculiarities of the Clinical Course of Periodontal Tissue Diseases in Persons With Primary Hypothyroidism”. Journal of Education, Health and Sport, vol. 7, no. 8, Aug. 2017, pp. 1091-00, https://apcz.umk.pl/JEHS/article/view/4771.