Carol Peters, Paul D. Clough, Fredric C. Gey, Jussi Karlgren, Bernardo Magnini, Douglas W. Oard, Maarten de Rijke, Maximilian Stempfhuber: Evaluation of Multilingual and Multi-modal Information Retrieval, 7th Workshop of the Cross-Language Evaluation Forum, CLEF 2006, Alicante, Spain, September 20-22, 2006, Revised Selected Papers. Lecture Notes in Computer Science 4730, Springer 2007, ISBN 978-3-540-74998-1