1. Cebeci Y. The investigation of affects some parameters on the performance on selective agglomeration of lignites, In: Sixth international mineral processing symposium. Kuşadası, Turkey; 1996. p. 445–459.
2. Factors effecting the cleaning of fine coals by the convertal process;Sun;Min Eng Nov,1959
3. Coal desulfurization prior to combustion;Elliot,1978
4. Physical cleaning of coal;Capes,1982
5. Pawlak W, Goddard R, Janiak J, Turak A, Ignasiak B. Oil agglomeration of low rank coals. In: Proceedings of 10th annual clean liquid+solid fuels contractors conference California, USA; 1985.