Hammerström, Lennart, Dirk Zwerenz, and Carsten Giebe. “Taxonomy of an Liot Device Based Upon Production Functions”. European Journal of Economics and Business Studies 8, no. 2 (August 31, 2019): 50–73. Accessed January 30, 2026. https://revistia.com/index.php/ejes/article/view/2849.