1. Amato, A., & Conti, M. (2005). The economics of the water industry: Technology, ownership, and efficiency. Milan: Franco Angeli.
2. Armstrong, M., Cowan, S., & Vickers, J. (1999). Regulatory reform: Economic analysis and British experience. Cambridge, MA: MIT Press.
3. Baldwin, R., & Cave, M. (1999). Understanding regulation: Theory, strategy, and practice. Oxford: Oxford University Press.
4. Baldwin, R., Scott, C., & Hood, C. (1998). A reader on regulation. Oxford: Oxford University Press.
5. Baumol, W. J. (1982). Contestable markets: An uprising in the theory of industry structure. The American Economic Review, 72(1), 1–15.