Alexander Tsatsulin N. and Vladislav Boldyrev A., “Simulation of Promotional Efforts as An Instrument of Competition in The Market “Fight” of Russian Mobile Operators” Proceedings of the 35th International Business Information Management Association (IBIMA), ISBN: 978-0-9998551-4-0, 1-12 April 2020, Seville, Spain, p.14496-14420.
Tsatsulin Alexander Nickolaevich and Evreinov Oleg Borisovich, “The Hybrid Model of Multivariate Index Analysis of Current Assets,” Proceedings of the 30th International Business Information Management Association (IBIMA), ISBN: 978-0-9860419-9-0, 8-9 November 2017, Madrid, Spain, p 3949-3960.