JUDGMENT OF THE COURT of 11 March 1997 in Case C-357/95 P: Empresa Nacional de Urânio SA (ENU) v. Commission of the European Communities (Appeal - EAEC - Supply - Right of option and exclusive right of the Euratom Supply Agency to conclude contracts for the supply of ores, source materials and special fissile materials - Infringement of the rules of the Treaty - Community preference - Principles of good faith and legitimate expectations - Non-contractual liability)