4Harvey Averch and Leland L. Johnson. Behavior of The Firm under Regulatory Constraint [ J ]. American Economic Review, 1962(12): 1 052-1069.
5W.J. Baumol and A.K. Klevorick. Input Choices and rate of return regulation: an overview of thediscussion [J]. Bell Journal of Economics and Management Science, 1970 (2) : 169- 190.
6Hirschhausen, C.V.. Infrastructure, regulation, investment and security of supply: A case studyof the restructured US natural gas market[J]. Utilities Policy, 2008(1) : 1-10.
7Gordon, D.V., K. Gunsch and C.V. Pawluk. A natural monopoly in natural gas transmission [ J ]. Energy Economics, 2003 (5): 473-485.
8Harold Hotelling. The Economics of Exhaustible Resources [J]. The Journal of Political Economy, 1931 (2) : 137 - 175.