Malyeyeva, O., V. Kosenko, Y. Davydovskyi, and D. Boiev. “FACTOR SYNERGY ANALYSIS AND MERGER STRATEGY MODELS IN INVESTIGATION OF TELECOMMUNICATION OPERATORS’ PERFORMANCE”. Advanced Information Systems, vol. 4, no. 2, June 2020, pp. 130-6, doi:10.20998/2522-9052.2020.2.19.