Taha, Ayad, and Shaima Najeeb. “A Mathematical Model for Estimating the Return on the Exploitation of Natural Capital Based on Contemporary Economic Ideas”. Humanities Journal of University of Zakho 9, no. 1 (March 30, 2021): 141–150. Accessed November 23, 2024. https://hjuoz.uoz.edu.krd/index.php/hum/article/view/670.