Russia and Estonia 'exchange spies' after Kohver row - BBC News
Spy Swaps Make a Comeback in “Intelligence Culture” - ICDS
Estonian intelligence officer Aleksei Dressen is arrested at the Tallinn Airport by his fellow counterintelligence officers in February 2012. : r/Spycraft101
Aleksei Dressen
Russia frees Estonian officer in cold war-style spy swap | Estonia | The Guardian
FSB: vahetasime Kohveri Dresseni vastu
Aleksei Dressen
Aleksei Dressen
Estonian Spy Hunters - The Warsaw Institute Review
Aleksei Dressen | intelNews.org
تويتر \ Estonia at NATO 🇪🇪 على تويتر: "#Estonia swaps abducted Eston Kohver for sentenced #Russian spy Aleksei Dressen http://t.co/x13QeASrXk http://t.co/GoF8HQf38G"
How smuggler helped Russia to catch Estonian officer | Re:Baltica
Experts weigh in on Kohver exchange | News | ERR
Venäjän vakoilijavärväys kiihtyy - Kotimaa | HS.fi
VIDEO: Riigireetur Aleksei Dressen sai karistuseks 16 aastat vanglas - Delfi TV
Russia, Estonia swap spies – DW – 09/26/2015
Riigireetur Dressen viidi Tartu vanglast menetlustoimingutele
Russia and Estonia make Le Carré style spy exchange
Russia and Estonia 'exchange spies' after Kohver row - BBC News
Ex-Security Official Convicted of Treason - The Moscow Times