POLKA, N.S., O.V. BERDNYK, O.V. DOBRIANSKA, T.V. STANKEVICH, and L.V. SAVON. 2013. “Prevalence of Tobacco Smoking Among Adoles-Cents in Ukraine (By the Results of the Global Youth Tobacco Survey, 2011)”. Environment & Health 66 (3): 57. https://dovkil-zdorov.kiev.ua/journal/article/view/748.