William J. Clinton “Public Papers of the Presidents of the United States, William J. Clinton, 1993, Bk. 2, August 1 to December 31, 1993”, Government Printing Office
Al Gore's testimony before the U.S. House of Representatives Energy and Commerce Committee's Subcommittee, and the Science and Technology Committee's Subcommittee on Climate Crisis, abcnews.go.com. March 21, 2007.
"Climate Science: Is it currently designed to answer questions?". Richard Lindzen's remarks for Program in Atmospheres, Oceans and Climate at Massachusetts Institute of Technology, arxiv.org. September 19, 2008.