OpenNet Initiative
- A collaborative study of filtering and surveillance by governments and corporations around the world by Harvard Law School, University of Toronto, and Cambridge University. Includes news, case studies, advisories, and a blog.
- http://www.opennetinitiative.net/index.php

Filtering the Internet in American Public Libraries: Sliding Down the Slippery Slope
- Essay by Jeannette Allis Bastian. "The use of filters to block those Internet sites that some public libraries and/or communities deem undesirable has caused an uproar within the profession as various viewpoints vie for ascendancy. The author examin
- http://www.firstmonday.org/issues/issue2_10/bastian/

Internet Filtering and Blocking
- Links to online resources about internet filtering programs and their use in libraries.
- http://www.libraryhq.com/filtering.html

Censorship in a Box
- American Civil Liberties Union White Paper subtitled 'Why Blocking Software is Wrong for Public Libraries'. "This special report ... provides an in depth look at why mandatory blocking software is both inappropriate and unconstitutional in libraries.
- http://www.aclu.org/Cyber-Liberties/Cyber-Liberties.cfm?ID=5001&c=16&Type=s