Nastos, George. “The Role of European Agencies in Transboundary Crises: Perspectives in the Post COVID-19 Era”. HAPSc Policy Briefs Series 2, no. 1 (June 30, 2021): 166–174. Accessed August 11, 2022. https://ejournals.epublishing.ekt.gr/index.php/hapscpbs/article/view/27673.