4HAGESTRAND T.Innovation as a spatial process[M].Chicago:University of Press,1967.12-14.
5MANSFIELD.The economics of technological change[M].W.W.Norton Company Inc.New York.
6Stoneman P Innovation diffusion.Bayesian learning and probability[J].Economic Journal,1981,91:375-388.
7ROGERS E M.Diffusion of innovation.3rd ed[M].New York Press,1983.
8SKIADAS CHRISTORS H.Innovation diffusion models expressing asymmetry and positively or negatively influencing forces[J].Technological Forecasting and Social Change,1986,30:313-330.
9SHARIF M N,RAMANTHAN.Binomial innovation difffusion models with dynamic potential adopter population[J].Tecnologial Forecasting and Social Change,1981,20:63-87.
10R KELLY MARYELLEN,HARVEY BOOK DS.Extemal learning opportunities and the diffusion of process innovation to small firms:the case of programmable automation[J].Technological Forecasting and Social Change,1991,39:103-125.