Griesbaum, J.; Rittberger, M.; Bekavac, B.: Deutsche Suchmaschinen im Vergleich : AltaVista.de, Fireball.de, Google.de und Lycos.de (2002)
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Griesbaum, J.; Rittberger, M.: ¬A collaborative lecture in information retrieval for students at universities in Germany and Switzerland (2005)
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