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O'Brien, H.L.; Toms, E.G.: What is user engagement? : a conceptual framework for defining user engagement with technology (2008)
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Buchanan, S.; Salako, A.: Evaluating the usability and usefulness of a digital library (2009)
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O'Brien, H.L.; Lebow, M.: Mixed-methods approach to measuring user experience in online news interactions (2013)
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Li, J.; Zhang, P.; Song, D.; Wu, Y.: Understanding an enriched multidimensional user relevance model by analyzing query logs (2017)
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