State Agency for National Security - Wikipedia
Bulgarian Interior Min Appears to Be 'Agent' of US Secret Service - Novinite.com - Sofia News Agency
Bulgarian Air Force - Wikipedia
Sun, sea and scams: six arrests for forging money and documents in Bulgaria | Europol
Служба „Военно разузнаване“ | Страници
State Intelligence Agency (Bulgaria) - Wikipedia
Secret Service officer recalled from Bill Clinton's Bulgaria trip after off-duty altercation, agency says - ABC News
Skeletons in the Closet – DW – 03/14/2008
Bulgaria must rid its spy services of Russia-backed agents, says head of leading party – POLITICO
WW2 German, Soviet, Allied militaria, uniforms, awards, weapons history. War relics forum
Alleged former communist state security agents gain prominence in Bulgarian Ministry of Foreign Affairs - EU Reporter
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
Bulgarian secret services take leave until September – Euractiv
RARE 1972 FOR MERIT TO KGB Secret Police Communist Medal Bulgaria Order document | eBay
Bulgaria Says French Thinker Was a Secret Agent. She Calls It a 'Barefaced Lie.' - The New York Times
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
USSS Officer Under Investigation Over Altercation in Bulgaria
bne IntelliNews - North Macedonia's president says Russian secret services are behind rift with Bulgaria
Bulgaria finds middle ground on weapon delivery to Ukraine – DW – 05/10/2022
Russian hitmen and saboteurs target Bulgaria's arms industry, magnate says
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
Committee for State Security (Bulgaria) - Wikipedia
