Multilingual and Multimodal Information Access Evaluation Second International Conference of the Cross-Language Evaluation Forum, CLEF 2011, Amsterdam, The Netherlands, September 19-22, 2011. Proceedings - Forner, Pamela; Gonzalo, Julio; Kekäläinen, Jaana; Lalmas, Mounia; Rijke, Marteen de (Springer Berlin Heidelberg : Imprint: Springer, 2011)