Hamburg: Stadt mit Herz für Faschisten
L.U.P.E. e.V. - The ISHR - International Society for Human Rights (June 1991)
Robert Wolfe - Gustav Hilger: From Hitler's Foreign Office to CIA Consultant (2006)
Kevin C. Ruffner - Forging an Intelligence Partnership: CIA and the Origins of the BND, 1945-49 - A Documentary History (1999)
Alfred McCoy - Science in Dachau's Shadow: Hebb, Beecher, and the Development of CIA Psychological Torture and Modern Medical Ethics (2007)
Olha Bila - The macro-regional project of Intermarium: The Baltic state’s perspective (Master's Thesis, 2020)
Elisabetta Cassina Wolff - CasaPound Italia: ‘Back to Believing. The Struggle Continues’ (July 2019)
Portuguese Documents Reveal Journalistic Cover For International Fascist Group; Link Group To Bombings, Counterinsurgency And Arms Traffic (Liberation News Service, February 1975)
Antwort auf kleine Anfrage: Aktivitäten der psychologischen Verteidigung (18 April 1989)
Bolivia: Neo-Nazi Terrorist Expelled (August 1983)
Beate Baldow - Episode oder Gefahr? Die Naumann-Affäre (PhD Thesis, 2012)
Eduardo González Calleja - Entre dos continentes. Estrategia de la tensión desde la ultraderecha latinoamericana a la europea (2017)
Denis Jdanoff - "Russische Faschisten": Der nationalsozialistische Flügel der russischen Emigration im Dritten Reich (2003)
Ernst Henri - Hitler over Europe (1934)
The Brown Network: The Activities of the Nazis in Foreign Countries (1936)
Excerpt from FBI file on Boris Brasol (1936)