Nurlybekova, A., Y. Ye, Z. Abilov, and J. Jenis. “Determination of Chemical Composition of the Ligularia Narynensis Root by Gas Chromatography-Mass Spectrometry”. Chemical Bulletin of Kazakh National University, no. 4, Dec. 2019, pp. 14-19, doi:https://doi.org/10.15328/cb1096.