Maghbouli, Mahnaz, Azam Pourhabib Yekta, and Monireh Zorriehhabib. “The Theory of Complex-Valued Data Envelopment Analysis (DEA)”. Systemic Analytics 2, no. 2 (August 11, 2024): 218–228. Accessed October 16, 2024. https://sa-journal.org/index.php/systemic/article/view/20.