Rađenović, Tamara, Vladimir Radivojević, Bojan Krstić, Tanja Stanišić, and Snežana Živković. “The Efficiency of Health Systems in Response to the Covid-19 Pandemic: Evidence from the EU Countries”. Problemy Ekorozwoju 17, no. 1 (January 3, 2022): 7–15. Accessed July 22, 2024. https://ph.pollub.pl/index.php/preko/article/view/4509.