1. EPA (Environmental Protection Agency), Low-pressure membrane filtration for pathogen removal: application, implementation, and regulatory issues, EPA 815-C-01-001, 2001.
2. N. Werner, Process for depleting viruses in solutions and determining their depletion rate, US 5 645 984 A, 1997.
3. B. Gerhard, L.P. Marcel, Method of checking the rate of removal of pyrogenic substances, in particular viruses, from organic material, US 5 731 164 A, 1998.
4. A comparison of methods for counting viruses in aquatic systems;Bettarel;Appl. Environ. Microbiol.,2000
5. Rapid enumeration of virus-like particles in drinking water samples using SYBR green I-staining;Rinta-Kanto;Water Res.,2004