Markaz al-Abḥāth fī al-Ḥiwār al-Masīḥī al-Islāmī

• al-Islām yusāʾilu al-Masīḥīyah fī shuʾūn al-lāhūt wa-al-falsafah
• Jawhar al-Masīḥīyah wa-mufāraqātuhā