BusyginE. (2019) «The Impact of Diversification of Production Activities by Major Public Oil Companies on the Value of Their Shares», Journal of Corporate Finance Research / Корпоративные Финансы | ISSN: 2073-0438, 13(4), сс. 106-117. doi: 10.17323/j.jcfr.2073-0438.13.4.2019.7-18.