Volchenko N, Sokolova I, Nazaryan R. Periodontal tissue condition (PMA), oral hygiene (OHI-S) and questionnaire survey in 9-11-year old schoolchildren with different education load. IC [Internet]. 2015Apr.21 [cited 2024May2];2(2):224-9. Available from: https://inter.knmu.edu.ua/article/view/70