«Reliability Evaluation and Optimization of Solar Based Ammonia Urea Production System: A Study on Lethal and Nonlethal Failures with Coverage Factor Considerations», NIJOR, vol. 3, fasc. 1, pp. 20–41, dic. 2025, Consultato: 15 giugno 2026. [Online]. Disponibile su: https://nijor.org.ng/index.php/nijor/article/view/4