“Understanding Internet Censorship Policy: The Case of Greece” by Vasilis Ververis, George Kargiotakis, Arturo Filastò, Benjamin Fabian and Afentoulis Alexandros
▻https://www.usenix.org/conference/foci15/workshop-program/presentation/ververis
▻https://www.usenix.org/system/files/conference/foci15/foci15-paper-ververis-update.pdf
A very good survey of the state of #Internet_censorship in one country, #Greece. Censorship is done against atheists, gamblers and other categories. Using local probes, they show the extent of censorship, whether it is by lying DNS, IP blocking or HTTP redirection.