Kurbanbayeva, A., U. Akhmedov, and A. Zainutdinov. “The Influence of the System of CO2+SURFACTANTS on the Properties of High-Viscosity Oil”. Chemical Bulletin of Kazakh National University, Vol. 67, no. 3, Sept. 2012, pp. 41-44, doi:https://doi.org/10.15328/chemb_2012_341-44.