Krebs, Groundbreaking Scientific Experiments, Inventions, and Discoveries; The Cambridge Dictionary of Philosophy, 2nd edition, Cambridge University Press, 1999: "Greek Neoplatonist philosopher who lived and taught in Alexandria."
Ecclesiastical History.  الوسيط |المسار= تم تجاهله (مساعدة); الوسيط |العنوان= تم تجاهله (مساعدة); الوسيط |الأخير= تم تجاهله (مساعدة); الوسيط |الأول= تم تجاهله (مساعدة) Krebs, Groundbreaking Scientific Experiments, Inventions, and Discoveries; The Cambridge Dictionary of Philosophy, 2nd edition, Cambridge University Press, 1999: "Greek Neoplatonist philosopher who lived and taught in Alexandria."