Iosifov, Valeriy Victorovich, et al. “The Problem of Harmonizing the Environmental Priorities of Electricity Generating Companies and Regional Socio-Economic Systems: DEA-Based Approach”. International Journal of Energy Economics and Policy, vol. 7, no. 5, Nov. 2017, pp. 159-65, https://econjournals.com/index.php/ijeep/article/view/5574.