1. Armak Industrial Chemical Division, Chicago, IL, Catalog, 1975.
2. Kirk, R.E., and D.F. Othmer, “Encyclopedia of Chemical Technology,” Vol. 2, 2nd Edition, John Wiley & Sons, NY, 1963, pp. 72–76.
3. Sonntag, N.O.V., in “Fatty Acids: Their Chemistry, Properties, Production and Uses,” Part 3, 2nd edition, John Wiley and Sons, NY, 1964, pp. 1578–1617.
4. McCutcheon's Detergents and Emulsifiers, annual North American edition, 1975.
5. Henkel, GmbH, Raw Materials for Cosmetics and Pharmaceuticals”, West Germany, 1977.