1. ZetaPlus is a registered trademark of Cuno Inc. Meriden, CT.
2. Knight, R.A., Fiore, J.V. and Rossitto, J.V. 1982. Microporous Membranes as Depth Filters. World Filtration Congress III, Downington, PA pp. 427–483
3. Mistry C., Gillilland, Koutalides, A. and Mandaro, R. 1984. Performance Study of a Semiconductor High Purity Water System Using Advanced Filtration Technlogies. 45th Annual Meeting International Water Conference, Pittsburgh, PA. IWC-84-91.
4. U.S. Patents 4,384,957, 4,496,461, 4,512,897, 4,604,198. Others pending in U.S. and worldwide.