N. Koroliova, V. Chorna, N. Humeniuk, V. Angelska, and S. Khlestova, “The prevalence of smoking among medical students”, Довкілля та здоров’я, vol. 92, no. 3, pp. 28–30, Oct. 2019, doi: 10.32402/dovkil2019.03.028.