F. Ekardt, “Defending Environmental Economic Instruments against the Economists and their Opponents: Analysing the Major Tool of Transformation to Sustainability”, Momentum Quarterly, vol. 5, no. 4, pp. 224–242, Dec. 2016, Accessed: Feb. 17, 2026. [Online]. Available: https://momentum-quarterly-journal.uibk.ac.at/momentum/article/view/1766