Данные по США за 1997 год: Carpenter R. Laundry Detergents in the Americas: Change and Innovation as the Drivers for Growth // A. Cahn, ed. Proceedings of the 4th World Conference on Detergents: Strategies for the 21st Century. Urbana, IL: AOCS Press, 1999. Данные по Европе: Garratt B. The Fish Rots From The Head. London: Profile Books, 2010.
