1. Tingstad JE (1964) Physical stability testing of pharmaceuticals. J Pharm Sci 53:955–962.
2. Perlia X (1967) Stability and stabilization of drugs. II. Physical viewpoints. Pharm Acta Helv 42:265–302.
3. ICH Guideline Q6A (1999) Specifications: Test Procedures and Acceptance Criteria for New Drug Substances and New Drug Products: Chemical Substances.
4. ICH Guideline Q1A (2001) Stability Testing of New Drug Substance and Products.
5. Pearlman R, Wang YJ (1996) Formulation, Characterization, and Stability of Protein Drugs: Case Histories. Plenum Publishing Corporation, New York.