Costigan, Sean S., and Todor Tagarev. "Twenty Years of Substantive Impacts on Security and Defense Discourse." Connections: The Quarterly Journal 22, no. 1 (2023): 5-6.

Costigan, Sean, and Greg Gleason. "What If Blockchain Cannot Be Blocked? Cryptocurrency and International Security." Information & Security: An International Journal 43, no. 1 (2019): 13-20.

Manko, Oleg, and Yurii Mikhieiev. "Defining the Concept of ?Hybrid Warfare? Based on the Analysis of Russia?s Aggression against Ukraine." Information & Security: An International Journal 41 (2018): 11-20.