共 31 条
- [1] ARCHIBUGI D, 1995, CAMBRIDGE J ECON, V19, P121
- [6] Breschi S, 2006, ROUTL STUD BUS ORGAN, V35, P268
- [7] Caloghirou Y, 2004, EUROPEAN COLLABORATION IN RESEARCH AND DEVELOPMENT, P1
- [9] Dyer H. J., 2006, 7323 NISTIR US DEP C
- [10] European Commission, 2002, OFFICIAL J EUROPEA L, VL355, P23