1. Ingram, L. O. et al. U.S. Patent 5,000,000.
2. Easley, C. E. et al. (1989), Cellulose Waste Conversion, Fed Batch SSF Institute of Gas Technology, 13th Annual Conference.
3. Katzen, R. (1991), Bio-Conversion of Cellulosic Wastes, AIChE Annual Meeting.