الاتفاقية العامة للتجارة فى الخدمات - ʿAbayd, Ḥassan; Jāmiʿat al-Qāhirah. Markaz al-Buḥūth wa-al-Dirāsāt al-Iqtiṣādīyah wa-al-Mālīyah (Occasional economic papers / Center for Economic & Financial Research & Studies, 2002)