共 18 条
[2]
Allison JR, 2004, GEORGETOWN LAW J, V92, P435
[5]
Hall BH, 2005, RAND J ECON, V36, P16
[7]
Harhoff Dietmar., 2005, European Patent Citations: How to Count and how to Interpret Them
[9]
KAISER U, 2004, CEBR MATCHED 1 UNPUB