1. Harmonised Tripartite Guideline on Impurities: Residual Solvents (Q3C), International Conference on Harmonisation of Technical Requirements for Registrations of Pharmaceuticals for Human Use (ICH), Geneva, 1997.
2. The Directorate for the Quality of Medicines of the Council of Europe, Identification and control of residual solvents, in: European Pharmacopoeia, fifth ed., Limit tests 2.4.24, Council of Europe, Strasbourg, 2005.
3. Society of Japanese Pharmacopoeia, Residual solvents test, in: Japanese Pharmacopoeia, 13th ed., vol. XIV, General Tests 51, Shibuya, Tokyo, 2003.
4. The United States Pharmacopeial Convention Inc., Organic volatile impurities, in: The United states Pharmacopoeia, 28th ed., Chemical Tests/<467>, The United States Pharmacopeial Convention Inc., Rochville, MD, 2005.
5. The State Pharmacopoeia Commission of PR China, Residual solvents test, in: Pharmacopoeia of the People's Republic of China, ed. 2005, vol. II, Appendix VIII P, Chemical Industry Press, Beijing, 2005.