Yessengeldin, Bauyrzhan, Gulzada Mukhamediyeva, Diana Sitenko, and Aiman Zhumanova. 2018. “Problems and Perspectives of Energy Security of Single - Industry Towns of the Republic of Kazakhstan”. International Journal of Energy Economics and Policy 8 (1):116-21. https://www.econjournals.com/index.php/ijeep/article/view/5661.