1. World Health Organization (WHO). Proposal to waive in vivo bioequivalence requirements for WHO model list of essential medicines immediate-release, solid oral dosage forms. Accessed August 10, 2010, 2006, at: http://whqlibdoc.who.int/trs/WHO_TRS_937_eng.pdf#page=403.
2. European Medical Agency. Committee for medicinal products for human use: Guideline on the Investigation of Bioequivalence. Accessed February 1, 2010, at: http://www.ema.europa.eu/docs/en_GB/document_library/Scientific_guideline/2010/01/WC500070039.pdf.
3. US Department of Health and Human Services:Food and Drug Administration.Guidance for industry: Waiver of in vivo bioavailability and bioequivalence studies for immediate-release solid oral dosage forms based on a Biopharmaceutics Classification System. Accessed December 20, 2010, at:http://www.fda.gov/downloads/Drugs/GuidanceComplianceRegulatoryInformation/Guidances/ucm070246.pdf.
4. Simultaneous determination of acetylsalicylic acid and salicylic acid in human plasma by high-performance liquid chromatography;Kees;J Chromatogr B Biomed Appl,1996
5. Martindale: The complete drug reference,2007