1. Food and Drug Administration (FDA), Guidance for Industry: Sterile Drug products Produced by Aseptic Processing, Current Good Manufacturing Practice, FDA, September 2004.
2. European Commission – Enterprise and Industry Directorate General – Consumer goods – Pharmaceuticals, The Rules Governing Medicinal Products in the European Union, Volume 4, EU Guidelines to Good Manufacturing Practice Medicinal Products for Human and Veterinary Use, Annex 1, Manufacture of Sterile Medicinal Products, 14 February (2008).
3. E. Greb, Can Redundant Filtration Make Sterility Assurance Double Sure?, PharmTech.com, 〈http://pharmtech.findpharma.com/pharmtech/article/articleDetail.jsp?id=740074〉
4. Impact of design and selection of prefilters on operating cost;Honig;Filtr. Sep.,1997
5. The importance of prefiltration;Dixit;Filtr. Sep.,2007