Belting, H. (2010). Afterthoughts on Alhazen's Visual Theory and Its Presence in the Pictorial Theory of Western Perspective. Variantology 4 : On Deep Time Relations of Arts, Sciences and Technologies In the Arabic-Islamic World and Beyond.

Belting, Hans. "Afterthoughts on Alhazen's Visual Theory and Its Presence in the Pictorial Theory of Western Perspective." Variantology 4 : On Deep Time Relations of Arts, Sciences and Technologies In the Arabic-Islamic World and Beyond 2010.

Belting, Hans. "Afterthoughts on Alhazen's Visual Theory and Its Presence in the Pictorial Theory of Western Perspective." Variantology 4 : On Deep Time Relations of Arts, Sciences and Technologies In the Arabic-Islamic World and Beyond, 2010.