Tax burdens of Russian oil producing companies - comparative analysis / I. Sharf, L. Grinkevich, M. Tsibulnikova, A. Grinkevich // Innovation management and education excellence vision 2020: from regional development sustainability to global economic growth : proceedings of the 27th International business information management association conference (IBIMA), Milan, Italy, 4-5 May 2016. Milan, 2016. P. 440-447. URL: http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000617118