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Costigan, Sean S.. "Sovereign or Global Internet? Russia and China Press for Cybercrime Treaty: An Update." Connections: The Quarterly Journal 22, no. 1 (2023): 91-98.
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 S.. "Sovereign or Global Internet? Russia and China Press for Cybercrime Treaty." Connections: The Quarterly Journal 20, no. 2 (2021): 9-13.
Costigan, Sean S., and Todor Tagarev. "Countering Crime, Hate Speech, and Disinformation in Cyberspace." Connections: The Quarterly Journal 20, no. 2 (2021): 5-8.
Costigan, Sean S., and Gustav Lindström. "Policy and the Internet of Things." Connections: The Quarterly Journal 15, no. 2 (2016): 9-18.