Judgment of the Court (Sixth Chamber) of 27 November 2001 in Joined Cases C-285/99 and C-286/99 (reference for a preliminary ruling from the Consiglio di Stato): Impresa Lombardini SpA — Impresa Generale di Costruzioni v ANAS — Ente nazionale per le strade, Società Italiana per Condotte d'Acqua SpA (C-285/99), and between Impresa Ing. Mantovani SpA and ANAS — Ente nazionale per le strade, Ditta Paolo Bregoli (C-286/99), intervener: Coopsette Soc. coop. arl (C-286/99) (Directive 93/37/EEC — Public works contracts — Award of contracts — Abnormally low tenders — Detailed rules for explanation and rejection applied in a Member State — Obligations of the awarding authority under Community law)