1. http://www.ema.europa.eu/docs/en_GB/document_library/Other/2009/10/WC500004913.pdf
2. http://www.fda.gov/ScienceResearch/SpecialTopics/CriticalPathInitiative/CriticalPathOpportunitiesReports/ucm077262.htm
3. http://www.ema.europa.eu/docs/en_GB/document_library/Regulatory_and_procedural_guideline/2009/10/WC500004201.pdf
4. http://www.ema.europa.eu/docs/en_GB/document_library/Scientific_guideline/2009/09/WC500002880.pdf
5. Factors associated with success of market authorisation applications for pharmaceutical drugs submitted to the European Medicines Agency European;Regnstrom;J. Clin. Pharmacol.,2010