Łącka, Irena, and Łukasz Brzezicki. “Joint Analysis of National Eco-Efficiency, Eco-Innovation and SDGS in Europe: DEA Approach”. Technological and Economic Development of Economy 28, no. 6 (November 15, 2022): 1739–1767. Accessed December 2, 2024. https://aviation.vgtu.lt/index.php/TEDE/article/view/17702.