Cohen, Samuel D, Joseph H Eto, Charles A Goldman, John A Beldock, and Geoffrey Crandall. "Environmental externalities: What state regulators are doing." The Electricity Journal 1990.
Cohen, Samuel D, Joseph H Eto, Charles A Goldman, John A Beldock, and Geoffrey Crandall. A Survey of State PUC Activities to Incorporate Environmental Externalities into Electric Utility Planning and Regulation. Berkeley: LBNL, 1990.PDF