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Jörgensen, C.; Jaimes, A.; Benitez, A.B.; Chang, S.-F.: ¬A conceptual framework and empirical research for classifying visual descriptors (2001)
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Rasmussen, E.M.: Indexing images (1997)
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Rowe, N.C.: Precise and efficient retrieval of captioned images : the MARIE project (1999)
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