共 55 条
[1]
ACS ZJ, 1992, AM ECON REV, V82, P363
[3]
Aharonson B.S., 2004, Industrial clustering and returns to inventive activity: Canadian biotechnology firms, 1991-2000
[4]
[Anonymous], 2002, J SMALL BUS MANAGE
[5]
Audretsch D., 2005, The Journal of Technology Transfer, V30, P207
[7]
Audretsch DB, 1996, AM ECON REV, V86, P630