Shokouhi, MiladAzzopardi, LeifThomas, Paul2015-12-109781605584836http://hdl.handle.net/1885/53289Keywords: Distributed information retrieval; Global expansion; Query expansion; Query expansion techniques; Retrieval performance; Search system; User interaction; Information retrieval; Information services; Research; Expansion Distributed information retrieval; Query expansionEffective Query Expansion for Federated Search200910.1145/1571941.15720152016-06-14