References (continued)
Gatignon, Hubert, Jehoshua Eliashberg and Thomas S. Robertson (1989), "Modeling Multinational Diffusion Patterns: An Efficient Methodology," Marketing Science, Vol. 8, No. 3 (Summer), 231-247.
Helson, Harry (1964), Adaptation-Level Theory, New York:Harper & Row.
Mahajan, Vijay, Eitan Muller and Rajendra K. Srivastava (1990), "Determination of Adopter Categories by Using Innovation Diffusion Models, Journal of Marketing Research, Vol. XXVII (February), 37-50.