Kvon, G. M., A. I. Prokopyev, V. A. Shestak, S. A. Ivanova, and K. V. Vodenko. “Energy Saving Projects As Energy Security Factors”. International Journal of Energy Economics and Policy, vol. 8, no. 6, Oct. 2018, pp. 155-60, https://www.econjournals.com/index.php/ijeep/article/view/7143.