US National Archives on Terrorism: https://www.archives.gov/research/alic/reference/terrorism-links.html

Lloyd Sealy Library, ‘Terrorism research resources: Websites’

Https://Guides.Lib.Jjay.Cuny.Edu/C.Php?G=288326&P=1922741

United Nations Office on Drugs and Crime, ‘The Use of the Internet for Terrorist Purposes https://www.unodc.org/documents/frontpage/Use_of_Internet_for_Terrorist_Purposes.pdf