For citations:

Khairutdinov V.F., Gumerov F.M. OIL SLUDGE AND TAR SANDS AS AN IMPORTANT SOURCE OIL AND PROBLEMATIC ENVIRONMENTAL FACTORS. Power engineering: research, equipment, technology. 2017;19(3-4):10-19. (In Russ.) https://doi.org/10.30724/1998-9903-2017-19-3-4-10-19