1. Cox, M.F., Surfactants, in Detergents and Cleaners, edited by K.F. Lange, Carl Hanser Verlag, Munich, 1984, pp. 43–90.
2. Greek, B.F., Sales of Detergents Growing Despite Recession, Chem. Eng. News 69(4):25–52 (1991).
3. Rubingh, D.N., Surface-Active Cationic Compounds in Detergency, in Cationic Surfactants, edited by D.N. Rubingh and P.M. Holland, Marcel Dekker, Inc., New York, 1990, pp. 469–507.
4. Boethling R.S., Environmental Fate and Toxicity in Wastewater Treatment of Quaternary Ammonium Surfactants, Water Res. 18:1061–1076 (1984).
5. Puchta, R., P. Krings, and P. Sandkühler, A New Generation of Softeners, Tenside Surf. Det. 30:186–191 (1993).