Hornborg, Alf. ‚ÄúCornucopia or Zero-Sum Game? The Epistemology of Sustainability‚ÄĚ. Journal of World-Systems Research 9, no. 2 (August 26, 2003): 205-216. Accessed August 13, 2020. http://jwsr.pitt.edu/ojs/jwsr/article/view/245.