D.M. armstrong, The Cambridge History of Later Greek and Early Medieval Philosophy, Cambridge University Press, 1967, p. 198. Citazione: There may have been a Christian Ammonius, master of the Christian Origen, who was a different person from the pagan Ammonius who taught the pagan Origen and Plotinus: though on the whole the probabilities seem in favour of the simpler hypothesis, that it was the same Ammonius who taught both Origens and Plotinus and that, though Porfiry and Eusebius both made mistakes, their mistakes were not as far reaching as Dörrie supposes (this is the view of Dodds).
