1. Deriving and paraphrasing information grammars using object-oriented analysis models

   • P.J.M. Frederiks
   • T.P. van der Weide

   Original article Pages: 437 - 488

2. A general procedure to check conjunctive query containment

   • Miguel R. Penabad
   • Nieves R. Brisaboa
   • José R. Paramá

   Original article Pages: 489 - 529