Biletsky, V., P. Molchanov, M. Sokur, G. Gayko, V. Savyk, V. Orlovskyy, M. Liakh, T. Yatsyshyn, and R. Fursa. “Research into the Process of Preparation of Ukrainian Coal by the Oil Aggregation Method”. Eastern-European Journal of Enterprise Technologies, vol. 3, no. 5 (87), June 2017, pp. 45-53, doi:10.15587/1729-4061.2017.104123.