9Hemant Bhargava, Vidyannand Choudhary,Ramayya Krishnan, "Pricing and Product Design: Intermediary Strategies in an Electronic Market.", Carnegie Mellon University.
10Joseph P.Bailey,Yannis Bakos, "An Exploratory Study of the Emerging Role of Electronic Intermediaries" , International Journal of Electronic Commerce, Volume 1, No.3, Spring 1997,pp.7-20.
