1. Microbial evaluation of filters for sterilising liquids;HIMA,1982
2. Standard test method for retention characteristics of 0.2-μm membrane filters used in routine procedures for the evaluation of microbiological water quality;ASTM D 3862,1992
3. Standard test method for determining bacterial retention of membrane filters utilised for liquid filtration;ASTM F 838,1992
4. Sterilisation and sterility assurance;USP XXII,1990
5. Guideline on sterile drug products produced by aseptic processing;FDA,1987