Kousuke Fujita, Takeshi Takenaka, Nariaki Nishino, & Kanji Ueda. (2009). Service Diffusion in a Market Considering Consumers’ Subjective Valuations . International Journal of Computer Information Systems and Industrial Management Applications, 1, 9. Retrieved from https://cspub-ijcisim.org/index.php/ijcisim/article/view/5