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MacCain, K.W.; White, H.D.; Griffith, B.C.: Comparing retrieval performance in online data bases (1987)
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Pratt, G.F.: ¬A brief hitchhiker's guide to MEDLINE (1994)
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Booth, A.: How consistent is MEDLINE indexing? (1990)
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Chan, L.M.: Library of Congress class numbers in online catalog searching (1989)
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Gil-Leiva, I.; Munoz, J.V.R.: Analisis de los descriptores de diferentes areas del conocimiento indizades en bases de datos del CSIC : Aplicacion a la indizacion automatica (1997)
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