1. Animated discussions at the 2007 annual meeting of the American Crystallographic Association, Salt Lake City, Utah, pointed rather clearly to the lack of consensus regarding a universally accepted functional description of polymorphism.
2. McCrone, W. C.InPhysics and Chemistry of the Organic Solid State;Fox, D.; Labes, M. M.; Weissberger, A.Eds.Wiley Interscience:New York, 1965; Vol.2, pp725−767.