Vasilenko, N., M. Khaykin, N. Kirsanova, A. Lapinskas, and L. Makhova. “Issues for Development of Economic System for Subsurface Resource Management in Russia through Lens of Economic Process Servitization”. International Journal of Energy Economics and Policy, vol. 10, no. 1, Nov. 2019, pp. 44-48, https://www.econjournals.com/index.php/ijeep/article/view/8303.