1. Biographical information http://www.nahste.ac.uk/isaar/GB_0237_NAHSTE_P0389.html
2. New world encyclopedia http://www.newworldencyclopedia.org/entry/Joseph_Lister
3. The future of gas sterilization http://www .anpro.com/support/indexeto.htm
4. Historical clinical perspective from 1911. Practical cystoscopy: Care of the instruments and preparation for a cystoscopic examination;Pilcher;Urol Nurs,2004
5. Rutala , W.A. Weber , D.J. the Healthcare Infection Control Practices Advisory Committee 2008 http://www.cdc.gov/hicpac/pdf/guidelines/Disinfection_Nov_2008.pdf