Schaus, John; Federici, Joseph; Sheppard, Lindsey. "Gray Zone Project". www.csis.org. CSIS. Archived from the original on 28 December 2021. Retrieved 24 February 2021.
defence.gov.au
theforge.defence.gov.au
Dobbs, Thomas; Fallon, Garth; Fouhy, Sarah (9 September 2020). Grey Zone. The Forge (Report). Australian Defence College. Archived from the original on 8 April 2022. Retrieved 18 March 2022.
Kapusta, Philip. "The Gray Zone"(PDF). www.soc.mil. United States Special Operations Command. Archived from the original(PDF) on 14 September 2021. Retrieved 18 February 2021.
"Challenging the Grey Zone". www.law.upenn.edu. University of Pennsylvania Law School. Archived from the original on 20 November 2021. Retrieved 18 February 2021.
web.archive.org
Dobbs, Thomas; Fallon, Garth; Fouhy, Sarah (9 September 2020). Grey Zone. The Forge (Report). Australian Defence College. Archived from the original on 8 April 2022. Retrieved 18 March 2022.
Kapusta, Philip. "The Gray Zone"(PDF). www.soc.mil. United States Special Operations Command. Archived from the original(PDF) on 14 September 2021. Retrieved 18 February 2021.
"Challenging the Grey Zone". www.law.upenn.edu. University of Pennsylvania Law School. Archived from the original on 20 November 2021. Retrieved 18 February 2021.
Schaus, John; Federici, Joseph; Sheppard, Lindsey. "Gray Zone Project". www.csis.org. CSIS. Archived from the original on 28 December 2021. Retrieved 24 February 2021.
worldcat.org
search.worldcat.org
Korolev, Alexander (2023). "Political and Economic Security in Eurasia: English School Perspective". China and Eurasian powers in a Multipolar World Order 2.0: Security, Diplomacy, Economy and Cyberspace. Mher Sahakyan. New York: Routledge. p. 11. ISBN978-1-003-35258-7. OCLC1353290533.