Property Rights and Takings - The Institute for Local Self Government offers a simple introduction to the takings issue, and a number of legal references. - http://www.ilsg.org/index.jsp?displaytype=§ion=land&zone=ilsg&sub_sec=land_property
The Property Rights Issue - Analysis of regulatory takings issues, disseminated by the Center for the National Institute for the Environment. (1995) - http://www.ncseonline.org/nle/crsreports/economics/econ-11.cfm?&CFID=15921847&CFTOKEN=70119245
GAO Report on Regulatory Takings - Report to the House Subcommittee on the Constitution, Committee on the Judiciary on the implementation of Executive Order 12630 on property rights. - http://www.gao.gov/new.items/d031015.pdf
Oregonians In Action - Focusing on the rights of private property owners, with links to news and cases. - http://www.oia.org/
Regulatory Takings and Proposals for Change - Report prepared by the United States Congressional Budget Office in 1998. Definitions, the status quo, discussion of compensation issues. - http://www.cbo.gov/showdoc.cfm?index=1051&sequence=0&from=0#anchor
Takings - Policy statement from the American Planning Association. - http://www.planning.org/priorities/takings.htm
Swamp Rules: The End of Federal Wetland Regulation? - article by Jonathan H. Adler in Regulation magazine. [PDF format. Requires Adobe Acrobat to view.] - http://www.cato.org/pubs/regulation/regv22n2/swamprules.pdf
Protecting Private Property Rights from Regulatory Takings - Testimony of Roger Pilon, Senior Fellow and Director Center for Constitutional Studies Cato Institute Before the Subcommittee on Constitution, Committee on Judiciary United States House of Representatives, February 10, 1995. - http://www.cato.org/testimony/ct-pi210.html
Regulatory Takings after Lucas - This article from Regulation magazine discusses the effect of the Supreme Court decision, "Lucas v. South Carolina Costal Council", on regulatory takings. - http://www.cato.org/pubs/regulation/reg16n3g.html