1. J. Bernstein, Polymorphism in Molecular Crystals; IUCr Monographs on Crystallography; 14th, Ed. (Oxford University Press, Oxford, 2002).
2. Polymorphism, what it is and how to identify it: a systematic review
3. W. McCrone, “polymorphism” in Physics and chemistry of the organic solid state, edited by D. Fox et al. (Interscience, New York, 1965), pp. 725–767.
4. Thermal analysis of polymorphism
5. Analysis of organic polymorphs. A review