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Truran, M.; Schmakeit, J.-F.; Ashman, H.: ¬The effect of user intent on the stability of search engine results (2011)
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Mettrop, W.; Nieuwenhuysen, P.: Internet search engines : fluctuations in document accessibility (2001)
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Petric, K.; Petric, T.; Krisper, M.; Rajkovic, V.: User profiling on a pilot digital library with the final result of a new adaptive knowledge management solution (2011)
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Thelwall, M.: Assessing web search engines : a webometric approach (2011)
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Bar-Ilan, J.: Methods for measuring search engine performance over time (2002)
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