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Koch, T.: Quality-controlled subject gateways : definitions, typologies, empirical overview (2000)
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Heery, R.; Carpenter, L.; Day, M.: Renardus project developments and the wider digital library context (2001)
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Kirriemuir, J.; Brickley, D.; Welsh, S.; Knight, J.; Hamilton, M.: Cross-searching subject gateways : the query routing and forward knowledge approach (1998)
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Campbell, D.: Australian subject gateways : political and strategic issues (2000)
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Monopoli, M.; Nicholas, D.: ¬A user evaluation of Subject Based Information Gateways : case study ADAM (2001)
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