Kairbekov, Z., Smagulova, N. and Kairbekov, A. 2013. Technology of catalytic processing of chark chemical tar. Chemical Bulletin of Kazakh National University. 71, 3 (Sep. 2013), 118-124. DOI:https://doi.org/https://doi.org/10.15328/chemb_2013_3118-124.