1. Dey S, A Comparative Study of Frother Performance in Coal Flotation, PhD Thesis, Indian School of Mines (2004).
2. SAIL (Steel Authority of India Ltd), Personal Communication (2009).
3. Gouricharan T, Sharma K K, Chattopadhyay U S, Sinha K M K, Chattopadhyay P C, Jha G S, Kabiraj S K, Haldar D D, Das T K, and Ghosh N K, in International Conference on Coking Coals and Coke Making: Challenges and Opportunities, Washability and Pilot Plant Studies to Generate Bulk Cleans at Desired Qualities from LVC Coal of Jharia Coalfields, (eds) Vijayavergia R K, Ray J K, Tirkey S, Viva Books, New Delhi (2009), p 219.
4. Bhattacharya S, Personal Research (2009).
5. Dell C C, Release analysis, A new tool for ore dressing research, in recent developments in mineral dressing, IMM (1953) p 75.