4Martinez L,Scanlon A P,Solleiro J L.Motivations andobstacles to university industry cooperation:a Mexicancase. R and D Management . 1993
5Teece DJ.Competition, cooperation, and innovation: organizational arrangements for regimes of rapid technological progress. Journal of Econometrics . 1992
6Etzkowitz H,Leydesdorff L.The dynamics of innovation:from national systems and "mode2" to a triple helix of univorsity-industry-government relations[J].Research Policy,2000,29(2):109-123.