Cases C-20/93 and C-21/93: References for a preliminary ruling by the Tribunal de Commerce de Bruxelles by judgments of that court of 11 January 1993 in the cases of Deutscher Kraftverkehr (DKV) v. SA Générale de Banque and Deutscher Kraftverkehr and BV Mobil Oil v. SA AG DE 1824, formerly AG DE 1830, and SA Générale de Banque — also attending: the Belgian State, represented by the Minister of Communications (C-21/93)