Multidisciplinary Information Retrieval Second Information Retrieval Facility Conference, IRFC 2011, Vienna, Austria, June 6, 2011, Proceedings - Hanbury, Allan.; Hanbury, Allan.; Rauber, Andreas.; Rauber, Andreas.; De Vries, Arjen.; De Vries, Arjen. (Springer Berlin Heidelberg : Imprint: Springer, 2011)