1. Chemical formulation: an overview of surfactant-based preparations used in everyday life;Hargreaves,2003
2. Anionic surfactants;Hibbs,2006
3. Cationic surfactants organic chemistry;Richmond,1990
4. Nonionic surfactants: organic chemistry;NMvan,1998
5. Biodegradability of amphoteric surfactants;Domsch,1995