Judgment of the Court (Grand Chamber) of 28 June 2005 in Joined Cases C-189/02 P, C-202/02 P, C 205/02 P to C 208/02 P and C 213/02 P: Dansk Rørindustri A/S and Others v Commission of the European Communities (Appeal — Competition — District heating pipes (pre-insulated pipes) — Article 85(1) of the EC Treaty (now Article 81(1) EC) — Cartel — Boycott — Fines — Guidelines on the method of setting fines — Non-retroactivity — Legitimate expectations — Lawfulness — Leniency notice — Obligation to state reasons)