1. D. J. W. Grant, in: Polymorphism in Pharmaceutical Solids, edited by H. G. Brittian, Theory and Origin of Polymorphism (Marcel Dekker, Inc., New York, 1999), chap. 1.
2. H. G. Brittian, Polymorphism in Pharmaceutical Solids (Marcel Dekker, Inc., New York, 1999).
3. A. L. Bingham, D. S. Hughes, M. B. Hursthouse, and R. W. Lancester, Chem. Commun. 603 (2001).
4. Pharmaceutical Applications of Polymorphism