Links
[1] https://www.dmlp.org/threats/corbett-v-twitter
[2] http://www.wired.com/threatlevel/2010/05/twitter-subpoena/#ixzz0oT52FDzx
[3] http://www.post-gazette.com/pg/10140/1059493-454.stm#ixzz0oT4RrX5u
[4] http://www.timesleader.com/news/ap?articleID=4596567
[5] http://www.abajournal.com/news/article/pennsylvania_ag_issues_subpoena_for_ids_of_two_twitter_critics/
[6] http://techcrunch.com/2010/05/19/tom-corbett-twitter/
[7] http://www.pennlive.com/midstate/index.ssf/2010/05/tom_corbett_subpoenaes_twitter.html
[8] https://www.dmlp.org/sites/dmlp.org/files/sites/citmedialaw.org/files/2010-05-06-%20Grand%20Jury%20Subpoena.pdf