"Cutaneous Hyperpigmentation: A Rare Extra-Intestinal Manifestation of Celiac Disease" (2023) Hadhramout University Journal of Natural & Applied Sciences, 15(2). موجود في: https://hu.edu.ye/hu-publications/journals/index.php/hujnas/article/view/137 (تاريخ الوصول: 29 يوليو 2026).