K. Gudun, M. Baikenov, A. Agabekova, M. F. Yun, Z. Kairbekov, and K. Zhubanov, “Catalytic hydrogenation of three-and quaternary mixtures polyaromatic hydrocarbons”, Chemical Bulletin of Kazakh National University, vol. 64, no. 4, pp. 48-52, Dec. 2011.