Eder, L. V., I. Filimonova, V. Nemov, and I. Provornaya. “Forecasting Sustainable Development of Transport Sectors of Russia and EU: Energy Consumption and Efficiency”. International Journal of Energy Economics and Policy, vol. 8, no. 2, Mar. 2018, pp. 74-80, https://www.econjournals.com/index.php/ijeep/article/view/5460.