أبوخذير ف. ا. ا. . The Effectiveness of Maintenance Planning in Oil Institutions (An Analytical study of Al-Zawiya Oil Refining Company). Al-Qurtas Journal for Human and Applied Sciences, [S. l.], v. 4, n. 27, 2025. Disponível em: https://alqurtas.alandalus-libya.org.ly/ojs/index.php/qjhar/article/view/1407. Acesso em: 6 nov. 2026.