C.  Bouras, Primpas, D., Alexiou, A., and Papagiannopoulos, J., ?Metropolitan Broadband Networks: Design and implementation aspects and business models?, in Global Diffusion of Broadband Data Transmission: Factors Affecting the Adoption, Usage and Economics of Broadband, vol. 1, IDEA Group Publishing, 2008, pp.  196 - 210.