1. 1997. Diethyl ether (DEE) as a renewable diesel fuel, SAE Paper 972978.
2. European Commission DG XVII. 1996. Draft Mandate to CEN for biodiesel standardization, Doc. 29/96 EN, M/245. Brussels, 11 June 1996.
3. 1991. Environmental effects and economic viability of alternative diesel fuels from vegetable oils, Proceedings of the Ninth International Symposium on Alcohol Fuels, ISAF-Firenze, pp. 984-987.
4. 1998. Transportation fuel substitutes derived from biomass, Extended Abstracts of the 2nd International Symposium on Advanced Energy Conversion Systems and Related Technologies (RAN 98), 1-3 December 1998, Nagoya, Japan, pp. 224-225.
5. 1991. Evaluation of oxygenated fuels using conventional and a new type of diesel engines, Proceedings of the Ninth International Symposium on Alcohol Fuels, ISAF-Firenze, pp. 336-341.