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Karki, M.M.S.: Patent citation analysis : a policy analysis tool (1997)
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Yan, B.; Luo, J.: Measuring technological distance for patent mapping (2017)
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Kousha, K.; Thelwall, M.: Patent citation analysis with Google (2017)
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Lai, K.-K.; Wu, S.-J.: Using the patent co-citation approach to establish a new patent classification system (2005)
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Cetintas, S.; Si, L.: Effective query generation and postprocessing strategies for prior art patent search (2012)
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