Mema is mostly involved in investigative journalism; his reports range from government corruption to human rights abuses. In 2011-2012 he reported from Margariti and Filiates about the properties of the Chams (Cham Albanians who used to live in the area until World War II) that have been appropriated by the Greek state. For his reports in 2012 he was banned from entering Greece and declared persona non grata. UJA (Union of Journalists of Albania) protested in front of the Greek embassy in Tirana against the entry ban.
- Besar Likmeta. "Greeks Bar Albanian Journalist as 'Security Threat'". Balkan Insight. Retrieved 2012-08-23.
- "Journalists protest in front of Greek embassy against entry ban issued over their colleague - Albanian Screen TV". News.albanianscreen.tv. Retrieved 2012-08-23.