共 109 条
[4]
[Anonymous], 2015, TRANSFORMER CHIEF NE
[5]
[Anonymous], 2001, NBER PATENT CITATION, DOI 10.3386/w8498
[6]
[Anonymous], 2009, OECD Patent Statistics Manual, DOI DOI 10.1787/9789264056442-EN
[7]
[Anonymous], 2008, Emory Law Journal
[8]
[Anonymous], 2006, EUROSTAT WORKING PAP