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Heery, R.: Information gateways : collaboration and content (2000)
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Ghiselli, C.; Padula, M.: ¬A unified access to extract knowledge from heterogeneous Web archives (2001)
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Avrahami, T.T.; Yau, L.; Si, L.; Callan, J.P.: ¬The FedLemur project : Federated search in the real world (2006)
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Johnson, E.H.: Objects for distributed heterogeneous information retrieval (2000)
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