Judgment of the Court (Sixth Chamber) of 8 March 2001 in Case C-68/99: Commission of the European Communities v Federal Republic of Germany (Failure to fulfil obligations — Freedom of establishment — Freedom to provide services — Social security — Regulation (EEC) No 1408/71 — Funding of the social insurance scheme for self-employed artists and journalists — Contribution collected from undertakings which market the work of artists and journalists, calculated on the basis of the remuneration paid to the authors — Account taken of remuneration paid to artists and journalists subject to the social security legislation of another Member State)