Allan Hanbury Andreas Rauber Arjen P. de Vries Multidisciplinary Information Retrieval - Second Information Retrieval Facility Conference, IRFC 2011, Vienna, Austria, June 6, 2011. Proceedings 6653 2011 https://doi.org/10.1007/978-3-642-21353-3 https://www.wikidata.org/entity/Q56449928 978-3-642-21352-6 IRFC Lecture Notes in Computer Science Springer db/conf/irfc/irfc2011.html