Carol Peters, Julio Gonzalo, Martin Braschler, Michael Kluck: Comparative Evaluation of Multilingual Information Access Systems, 4th Workshop of the Cross-Language Evaluation Forum, CLEF 2003, Trondheim, Norway, August 21-22, 2003, Revised Selected Papers. Lecture Notes in Computer Science 3237, Springer 2004, ISBN 3-540-24017-9