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Leung, C.H.C.; Hibler, D.; Mwara, N.: Picture retrieval by content description (1992)
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Enser, P.G.B.: Pictorial information retrieval (1995)
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Cawkell, A.E.: Picture databases (1993)
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Swiatecki, S.: Komputerbasereds billedbiblioteker i fremmarch (1993)
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Cassi, L.: Relational tools to manage pictorial information (1992)
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