How a Poisoning in Bulgaria Exposed Russian Assassins in Europe - The New York Times
Bulgarian secret services contradict on Russian war's external impact – Euractiv
The Bulgarian Umbrella, The Soviet Direction and Operation of the Bulgarian Secret Service in Europe by Kostov, Vladimir: Fine Hardcover (1988) First Edition. | Bruce Davidson Books
Hijacking the Military Intelligence Service
USSS Officer Under Investigation Over Altercation in Bulgaria
Amazon.com: The Bulgarian Umbrella: The Soviet Direction and Operations of the Bulgarian Secret Service in Europe (English and French Edition): 9780312023874: Kostov, Vladimir, Reynolds, Ben: Books
Bulgaria, US Secret Service in counterfeit money raid Bulgaria Police Ukraine Sofia US Secret Service | The Independent
KGB: History, Structure and Operations - Grey Dynamics
State Intelligence Agency (Bulgaria) - Wikipedia
State Agency for National Security - Wikipedia
Amazon.com: The Bulgarian Umbrella: The Soviet Direction and Operations of the Bulgarian Secret Service in Europe (English and French Edition): 9780312023874: Kostov, Vladimir, Reynolds, Ben: Books
Alleged former communist state security agents gain prominence in Bulgarian Ministry of Foreign Affairs - EU Reporter
badge information page - Viewing Badge Bulgarian Military Intelligence Service Desk Medal
Bulgarian Armed Forces - Wikipedia
More Details about Espionage Scandal: Group of Top Bulgarian Military Involved in Spying for Russia Detained – Novinite.com – Sofia News Agency | PrepYou.Eu - Bulgaria's Military & Medical Training Experts
Russian hitmen and saboteurs target Bulgaria's arms industry, magnate says
Bulgarian Journalists Search the Files of the Former State Security Services: The Murder of Georgi Markov, The Assassination Attempt on the Pope, and The Communist Regime's Repression | UNREDACTED
WW2 German, Soviet, Allied militaria, uniforms, awards, weapons history. War relics forum
Bulgarian Air Force - Wikipedia
Sun, sea and scams: six arrests for forging money and documents in Bulgaria | Europol
Bulgarian secret services take leave until September – Euractiv
Bulgaria must rid its spy services of Russia-backed agents, says head of leading party – POLITICO
Skeletons in the Closet – DW – 03/14/2008
Committee for State Security (Bulgaria) - Wikipedia
Bulgaria Busts Forgers who Advertized a Stallone Passport Replica
WW2 German, Soviet, Allied militaria, uniforms, awards, weapons history. War relics forum
