„Reliability Evaluation and Optimization of Solar Based Ammonia Urea Production System: A Study on Lethal and Nonlethal Failures with Coverage Factor Considerations“ (2025) Nigerian Journal of Operations Research, 3(1), S. 20–41. Verfügbar unter: https://nijor.org.ng/index.php/nijor/article/view/4 (Zugegriffen: 15 Juni 2026).