1. Sauer JD (1990) Amine oxides, in Cationic surfactants: organic chemistry. In: Richmond JM (ed) Surfactant science series, vol 34. Marcel Dekker, Inc., pp 275–295
2. http://www.stepan.com
3. Stepan Studies: 99-011C and 02-016A (2003); http://www.stepan.com
4. Flick EW (1993) Industrial surfactants, 2nd edn. William Andrew Publishing, Noyes
5. Sommerdijk NAJM, Hoeks TL, Booy KJ, Feiters MC, Nolte RJM, Zwanenburg B (1998) Dicephalic surfactants. Chem Commun pp 743