1. Fiese EF, Hagen TA. Preformulation. In: Lachman L, Lieberman HA, Kanig JL, editors. The theory and practice of industrial pharmacy. Philadelphia: Lea & Febiger; 1986. p. 171–85.
2. Wells J. Pharmaceutical preformulation: the physicochemical properties of drug substances. In: Aulton ME, editor. Pharmaceutics. 2nd ed. Edinburgh: Churchill Livingstone; 2002. p. 113–38.
3. Grant DJW. The theory and origin of polymorphism. In: Brittain HG, editor. Polymorphism in pharmaceutical solids. New York: Marcel Dekker; 1999. p. 1–31.
4. Giron D, Mutz M, Garnier S. Solid-state of pharmaceutical compounds, impact of the ICH Q6 guideline on industrial development. J Therm Anal Calorim. 2004;77:709–47.
5. Haleblian J. Characterization of habits and crystalline modification of solids and their pharmaceutical applications. J Pharm Sci. 1975;64:1269–88.