5Etzkowitz H,Leydesdorff L A. The endless transition: a "triple helix" of university - industry - government rela- tions[J]. Minerva, 1998,36(3) :203-208.
6Leydesdorff L A, Martin Meyer. The triple helix of uni- versity - industry - government relations [ J ]. Scientomet- rics,2003,58(2) : 191-203.
7Frieder Meyer - Krahmer, Ulrich Schmoch. Science - based technologies: university - industry interactions in four fields [ J ]. Research Policy, 1998,27 ( 8 ) : 835 - 851.
8Petra Ahrweiler, Andreas Pyka, Nigel Gilbert. A new model for university - industry links in knowledge - based economies [ J ]. Journal of Production manage- ment,2011,28(2) : 218-235.