Kapar, A., A. B. Ibraimov, M. M. Sergazina, M. B. Alimzhanova, and M. B. Abilev. “Analysis of Tobacco Products by Chromatography Methods: Review”. International Journal of Biology and Chemistry, vol. 11, no. 1, Aug. 2018, pp. 133-41, doi:10.26577/ijbch-2018-1-297.