共 3 条
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Erratum to “Citations, family size, opposition and the value of patent rights”[Research Policy 32 (2003) 1343–1363][J] . Dietmar Harhoff,Frederic M Scherer,Katrin Vopel.Research Policy . 2003 (2)
[2]
Valuation effects of patent quality: A comparison for Japanese and U.S. firms[J] . Mark Hirschey,Vernon J. Richardson.Pacific-Basin Finance Journal . 2001 (1)