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Topi, H.; Lucas, W.: Mix and match : combining terms and operators for successful Web searches (2005)
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Lorigo, L.; Haridasan, M.; Brynjarsdóttir, H.; Xia, L.; Joachims, T.; Gay, G.; Granka, L.; Pellacini, F.; Pan, B.: Eye tracking and online search : lessons learned and challenges ahead (2008)
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Chen, H.-M.; Cooper, M.D.: Stochastic modeling of usage patterns in a Web-based information system (2002)
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