Kirichenko OS, Komzolov AA, Nazarova YA, Shcherbakova NS, Kirichenko TV. Diversification of Russian Oil and Gas Upstream Companies. IJEEP [Internet]. 2020 Mar. 17 [cited 2024 Nov. 23];10(3):112-8. Available from: https://econjournals.com./index.php/ijeep/article/view/9194