1. Department of Trade and Marketing, Siberian Federal University, 79 Svobodny Av., 660041 Krasnoyarsk, Russia
2. Department of Open Pit Mining, T.F. Gorbachev Kuzbass State Technical University, 28 Vesennya St., 650000 Kemerovo, Russia
3. Department of Political Economy and History of Economic Science, Plekhanov Russian University of Economics, 36 Stremyanny Lane, 117997 Moscow, Russia