Bölükbaş, Mehmet, and Agata Szymańska. “The Nexus Between CO2 Emissions and Health Expenditure – Causality Evidence from Selected CEE Countries”. Comparative Economic Research. Central and Eastern Europe 28, no. 2 (June 26, 2025): 97–113. Accessed December 5, 2025. https://czasopisma.uni.lodz.pl/CER/article/view/26849.