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Vakkari, P.; Huuskonen, S.: Search effort degrades search output but improves task outcome (2012)
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Su, L.T.; Chen, H.L.: Evaluation of Web search engines by undergraduate students (1999)
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Vanopstal, K.; Stichele, R.Vander; Laureys, G.; Buysschaert, J.: PubMed searches by Dutch-speaking nursing students : the impact of language and system experience (2012)
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Bellardo, T.; Saracevic, T.: Online searching and search output : relationships between overlap, relevance, recall and precision (1987)
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