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Ruthven, Ian and Baillie, Mark and Azzopardi, Leif and Bierig, Ralf and Nicol, Emma and Sweeney, Simon and Yaciki, Murat (2008) Contextual factors affecting the utility of surrogates within exploratory search. Information Processing and Management, 44 (2). pp. 437-462. ISSN 0306-4573
Ruthven, Ian and Glasgow, Leif Azzopardi and Baillie, Mark and Bierig, Ralf and Nicol, Emma and Sweeney, Simon and Yakici, Murat (2007) Intra-assessor consistency in question answering. 30th annual international ACMProceedings of SIGIR conference on Research and development in information retrieval. p. 727.