1. Bradshow, G. B.,“A Report on Ester Interchange”,Soap Saint. Chem.,18, 23 (1942).
2. Bradshow, G. B. and Meuly, W. C., US Patent 2,360,844 (1944).
3. Freedman, B., Pryde, E. H. and Mounts, T. L.,“Variables Affecting the Yields of Fatty Esters from Transesterified Vegetable Oils”,JAOCS,61, 1638 (1984).
4. Keim, G. I., US Patent 2,383,601 (1945).
5. Kim, S. H.,“Purification Technology of Exhaust Gas for Diesel Engine Vehicle ”,Chemical Industry and Technology,10, 76 (1992).