Lenkova, O. V., Permyakov, A. S., Yakunina, O. G., & Vechkasova, M. V. (2017). Problems and Prospects of Innovative Development of Petrochemical Enterprises. International Journal of Energy Economics and Policy, 7(3), 321–325. Retrieved from https://econjournals.com/index.php/ijeep/article/view/5115