M-Dyaa Albakour, Udo Kruschwitz, Brendan Neville, Deirdre Lungley, Maria Fasli, Nikolaos Nanas. University of Essex at the TREC 2011 Session Track. In Ellen M. Voorhees, Lori P. Buckland, editors, Proceedings of The Twentieth Text REtrieval Conference, TREC 2011, Gaithersburg, Maryland, November 15-18, 2011. National Institute of Standards and Technology (NIST), 2011. [doi]