2ETZKOWITZ H. The dynamics of innovation: from nation- al systems and mode 2 to a triple helix of university- indus- try-government relations [J]. Research Policy, 2000 (29) : 109-123.
3ETZKOWITZ H. The triple helix of University-Industry- Government implications for policy and evaluation [R]. Working Paper of Institutet for studier bildning ochforskn- ing, 2002.
4ETZKOWITZ H. Research groups as quasi-firms the in- vention of the entrepreneurial university[J]. Research Poli- cy, 2003(32): 109-121.
5LEYDESDORFF L. The triple helix: a evolutionary model of innovations [J]. Research Policy, 2000(29) :243-255.
