共 68 条
[5]
[Anonymous], 2013, Regression Analysis of Count Data
[6]
[Anonymous], 1993, COUNTRY COMPETITIVEN
[7]
[Anonymous], 1972, Invisible colleges: diffusion of knowledge in scientific communities
[10]
Baum JAC, 2000, STRATEGIC MANAGE J, V21, P267, DOI 10.1002/(SICI)1097-0266(200003)21:3<267::AID-SMJ89>3.0.CO