T. Gouri Charan, S. Choudhury, S. C. Majhi, P. S. Prasad, and P. K. Singh, “Studies on the Cleaning Potentialities of High Ash Indian Non-Coking Coals for Meeting the MOEF’s Stipulations”, jmmf, vol. 66, no. 7, pp. 370–374, Oct. 2022.