1. J. M. Kinnunen, A. H. Rimpelä, P. L. Lindfors, L. Clancy, J. Alves, L. Hoffmann, M. Richter, A. E. Kunst, V. Lorant, Electronic cigarette use among 14- to 17-year-olds in Europe, Eur. J. Publ. Health doi: 10.1093/eurpub/ckaa145.
2. K. A. Cullen, A. S. Gentzke, M. D. Sawdey, J. T. Chang, G. M. Anic, T. W. Wang, M. R. Creamer, A. Jamal, B. K. Ambrose, B. A. King, E-Cigarette use among youth in the United States, 2019, JAMA, J. Am. Med. Assoc. doi: 10.1001/jama.2019.18387.
3. R. Reile, K. Pärna, E-cigarette use by smoking status in Estonia, 2012-2018, Int. J. Environ. Res. Publ. Health 17 (2), doi: 10.3390/ijerph17020519.
4. Two-year trends and predictors of e-cigarette use in 27 European Union member states, Tob;Filippidis;Control,2017
5. Flavoring chemicals and aldehydes in E-cigarette emissions;Klager;Environ. Sci. Technol.,2017