1. Industrial Application of Surfactants; RSC: London, 1988; p 205.
2. Surfactants in Consumer Product; Sevak Publications: Bombay, 1987; p 22.
3. ; Surfactant Biodegradation; Marcel Dekker: New York, 1987; p 513.
4. ; Nonionic Surfactants; Marcel Dekker: New York, 2000; p 365.
5. U.S. Pat. 3839318 ( 1974).