1. Pharmaceutical Applications of Polymorphism
2. aThe United States FDA. Guidance for Submitting Supporting Documentationin Drug applications for the Manufacture of Drug Substances, (1987.
3. bICH Expert Working Group. Test Procedures and AcceptanceCriteria for New Drug Substances and New Drug Products: Chemical Substances;Q6A, (1999.
4. cThe United States FDA. Guidance for Industry: PharmaceuticalSolid Polymorphism, (2007.
5. Crystal structures of drugs: advances in determination, prediction and engineering