JUDGMENT OF THE COURT (Sixth Chamber) of 17 April 1997 in Case C-147/95 (reference for a preliminary ruling from the Diikitiko Efetio Athinon): Dimosia Epicheirisi Ilectrismou (DEI) v. Evthimios Evrenopoulos (Social policy - Men and women - Equal treatment - Applicability of Article 119 of the EC Treaty or Directive 79/7/EEC - Insurance scheme of a State electricity company - survivors' pensions - Protocol No 2 to the Treaty on European Union - Meaning of 'legal proceedings')