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  • × year_i:[2010 TO 2020}
  1. Levitt, J.M.; Thelwall, M.; Oppenheim, C.: Variations between subjects in the extent to which the social sciences have become more interdisciplinary (2011) 10.09 
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    Levitt, J.M.
  2. Thelwall, M.; Levitt, J.M.: National scientific performance evolution patterns : retrenchment, successful expansion, or overextension (2018) 10.09 
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    Levitt, J.M.

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