1. Fed. Reg. (2005) 70, 134
2. Massa T (2003) Summary of FDA/PQRI Workshop. at the ACPS Manufacturing Subcommittee 17 Sept
3. Woodcock J (2004) The concept of pharmaceutical quality. Am Pharm Rev 7(6):10–15
4. Byrn SR, Pfeiffer RR, Stowell JG (1999) Solid state chemistry of drugs, 2nd edn. Press, SSCI
5. Docherty R, Jones W (1997) Organic Molecular Solids: Properties and Applications. CRC Press: Boca Raton ch 3