1. Torbeck L, Diane R, Dennis EG (2011) Recall Root Cause Analysis. PDA J Pharm Sci and Tech 65(5) 1-11.
2. http://journal.pda.org/content/65/5/535.full
3. https://hmc.usp.org/sites/default/files/documents/HMC/GCs-Pdfs/c61.pdf
4. http://www.usp.org/sites/default/files/usp_pdf/EN/USPNF/generalChapter62.pdf
5. http://www.fda.gov/ICECI/Inspections/IOM/