1. 1. Gray, J. C.; Staerk, A.; Berchtold, M.; Hecker, W.; Neuhaus, G.; and Wirth, A; Growth-promoting properties of different solid nutrient media evaluated with stressed and unstressed micro-organism: pre-study for validation of a rapid sterility test. PDA J. Pharm. Sci. & Technol. 2010, 64 (3) 249-263
2. 2. Chapter <71> Sterility Tests, USP 37--NF32, pg. 71-77; U.S. Pharmacopoeial Convention: Rockville, MD, 2014
3. 3. European Pharmacopoeia Working Group. EP 2.6.1. Sterility. London, UK: EMA;.
4. 4. Sage, A; Use of stressed populations for application validation to better represent real world testing. American Pharmaceutical Review. Aug 2013. 15-21.
5. 5. Dupont, C.; Augustin, Influence of stress on single-cell lag time and growth probability for Listeria monocytogenes in half fraser broth. App. Environ Microbiol, 2009; 75; 3069-3076