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Pulgarin, A.; Gil-Leiva, I.: Bibliometric analysis of the automatic indexing literature : 1956-2000 (2004)
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- Information processing and management. 40(2004) no.2, S.365-377
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Gil-Leiva, I.; Alonso-Arroyo, A.: Keywords given by authors of scientific articles in database descriptors (2007)
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- Journal of the American Society for Information Science and Technology. 58(2007) no.8, S.1175-1187