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Garfield, E.: Citation indexing : its theory and application in science, technology, and humanities (1979)
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Borko, H.; Bernier, C.L.: Indexing concept and methods (1978)
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Fugmann, R.: Theoretische Grundlagen der Indexierungspraxis (1992)
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Metadata for semantic and social applications : proceedings of the International Conference on Dublin Core and Metadata Applications, Berlin, 22 - 26 September 2008, DC 2008: Berlin, Germany (2008)
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