Melidis, Michail, and Stylianos Ioannis Tzagkarakis. “Assessing Air Quality in Greece in Times of a Global Pandemic”. HAPSc Policy Briefs Series 2, no. 1 (June 30, 2021): 87–93. Accessed December 18, 2024. https://ejournals.epublishing.ekt.gr/index.php/hapscpbs/article/view/27663.