N. I. Fayzullaev., S. Yu. Bobomurodova., L. M. Kurbanova., А. Yu. Buronov. “The Physicochemical and Textural Characteristics of Catalysts in the Catalytic Aromatization Reaction of Propane- Butane Fractions ”. International Journal of Control and Automation, Vol. 13, no. 4, May 2020, pp. 888 -96, http://sersc.org/journals/index.php/IJCA/article/view/18886.