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Brennscheidt, A.: AskA-Services : Nicht-bibliothekarische Informationsdienstleister im Internet (2003)
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McCrea, R.: Evaluation of two library-based and one expert reference service on the Web (2004)
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Cloughley, K.: Digital reference services : how do the library-based services compare with the expert services? (2004)
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Barjak, F.: ¬The role of the Internet in informal scholarly communication (2006)
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Katzmayr, M.; Putz, M.: Quellenproblematik im Internet : Identität, Aktualität und inhaltliche Qualität von Webressourcen (2006)
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Shachaf, P.; Oltmann, S.M.; Horowitz, S.M.: Service equality in virtual reference (2008)
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Lochore, S.: How good are the free digital reference services? : a comparison of library-based and expert services (2004)
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Rowlands, I.; Nicholas, D.; Williams, P.; Huntington, P.; Fieldhouse, M.; Gunter, B.; Withey, R.; Jamali, H.R.; Dobrowolski, T.; Tenopir, C.: ¬The Google generation : the information behaviour of the researcher of the future (2008)
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