A. T. Massenova, A. Zhaxibayeva, Zhumakanova А., G. Z. Yeligbayeva, and K. Rafikova, “Benzene Alkylation by Ethanol over Catalysts on the Base of Modified Natural Zeolites”, Eurasian Chem.-Technol. J., vol. 14, no. 3, pp. 211–217, Sep. 2012.