1. Baumol, W.J., 1983. Some subtle pricing issues in railroad regulation, International Journal of Transport Economics 10(1–2), August, 341–355
2. Bernheim, B.D., Willig, R.D., 1996. The scope of competition in telecommunications, mimeo, AEI Studies in Telecommunications Regulation
3. Bernheim, B.D., Willig, R.D., 1997
4. BellSouth New Zealand, 1995. Comments on Regulation of Access to Vertically-Integrated Natural Monopolies
5. Crandall, R.W., 1991. After the Breakup: U.S. Telecommunications in a More Competitive Era, Brookings Institution, Washington DC