1. Aqa, S., 1990. A Study of Densification of Pre-heated Sawdust, Master's thesis No. ET-90-4, Asian Institute of Technology, Thailand.
2. “Densification of preheated sawdust for energy conservation”,;Aqa;Energy,1992
3. The Development of an Energy Production System to Briquette Papyrus Through Partial Pyrolytic Conversion;Joseph,1985
4. “Residue briquetting in developing countries”,;Joseph,1985
5. Mishra, S.K., 1996. “Hardfacing of screw for wear resistance”, Proceedings of the International Workshop on Biomass Briquetting, New Delhi, India, 3-6 April 1995.