1. Cheah, S.C. and Ooi, L.C.L. 1984. Isolation of Thermophilic Cellulolytic Fungi. Paper presented at the Regional UNESCO Seminar on Applied Microbiology and Biotechnology, Bangkok and Khon Kaen, Thailand. 23?24 December.
2. Chooi, C.F. 1984. Ponding system for palm oil mill effluent treatment.Workshop Proceedings of the Palm Oil Research Institute Malaysia,9, 53?62.
3. Chua, N.S. and Gian, H.L. 1986. Biogas Production and Utilization ? Keck Seng's Experience. Paper presented at National Workshop on Recent Development in Palm Oil Milling Technology and Pollution Control, Kuala Lumpur, Malaysia, 5?6 August.
4. Greenshields, R.N. 1981. Review of progress of tower fermentation system for treatment of palm oil mill effluent.Proceedings of the Third MOPGC Symposium on Treatment Disposal of Palm Oil Mill Effluent 1977?1978, Part C, pp.178?185.
5. Jorgensen, H.K. 1982. The UP decanter-drier system for reduction of palm oil mill effluent.Proceedings of the Regional Workshop on Palm Oil Mill Technology and Effluent Treatment, Kuala Lumpur.