8Bass F M. A new product growth model for consumer durables[J]. Manage Science, 1969, 15(5): 215-227.
9Norton J A, Bass F M. A diffusion theory model of adoption and substitution for successive generations of hightechnology products[J]. Manage Science, 1987, 33(9): 1069-1086.
10Mahajan V, Muller E. Timing, diffusion and substitution of successive generations of technological innovations: the IBM mainframe case[J]. Technology. Forecast. Soc. Change, 1996, 51: 109-132.
