Baizhumanova, R., F. Germi, S. Kalugin, Z. Abilov, and D. Omarova. “Innovative Method of Direct Determination of the Content of Paraffins, Naphthenes, Aromatics and Sulfur Compounds by Capillary High-Resolution Gas Chromatography”. Chemical Bulletin of Kazakh National University, Vol. 65, no. 1, Mar. 2012, pp. 219-24, doi:https://doi.org/10.15328/chemb_2012_1219-224.