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Leydesdorff, L.; Rafols, I.: ¬A global map of science based on the ISI subject categories (2009)
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- Journal of the American Society for Information Science and Technology. 60(2009) no.2, S.348-362
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Rafols, I.; Leydesdorff, L.: Content-based and algorithmic classifications of journals : perspectives on the dynamics of scientific communication and indexer effects (2009)
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- Journal of the American Society for Information Science and Technology. 60(2009) no.9, S.1823-1835
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Lucio-Arias, D.; Leydesdorff, L.: ¬An indicator of research front activity : measuring intellectual organization as uncertainty reduction in document sets (2009)
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- Journal of the American Society for Information Science and Technology. 60(2009) no.12, S.2488-2498