Fluri, Philipp, and Leonid Polyakov. "Intelligence and Security Services Reform and Oversight in Ukraine ? An Interim Report." Connections: The Quarterly Journal 20, no. 1 (2021): 51-59.

Polyakov, Leonid. "On Integrity of Intelligence in Countries of Eastern Europe." Information & Security: An International Journal 30, no. 1 (2013): 55-63.