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Garnsey, M.R.: What distance learners should know about information retrieval on the World Wide Web (2002)
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Schlegl, K.: ¬The reference world expands : new options for answering questions (1998)
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White, R.W.; Marchionini, G.: Examining the effectiveness of real-time query expansion (2007)
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Dani, A.; Chatzopoulou, C.; Siatri, R.; Mystakopoulos, F.; Antonopoulou, S.; Katrinaki, E.; Garoufallou, E.: Digital libraries evaluation : measuring Europeana's usability (2015)
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Benkowsky, J.; Bühring, B.; Georgy, U.; Linde, F.: Information pricing : the development of a product- and pricing concept for the research centre of the Public Library Cologne (2005)
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