The present invention is directed to new crystalline forms of Atorvastatin calcium (2:1), referred to hereinafter as polymorphic Forms X, A, B1, B2, C, D and E. Furthermore, the present invention is directed to processes for the preparation of these crystalline forms and pharmaceutical compositions comprising...http://www.google.es/patents/US7538136?utm_source=gb-gplus-sharePatente US7538136 - Crystalline forms of atorvastatin
