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2. Ibn-al-Haitham [Alhacen]: The optics of Ibn al-Haytham: books I–III, On direct vision, übers. und komm. von A. I. Sabra, 2 Bde., London.
3. Ibn-al-Haitham [Alhacen]: Alhacen’s theory of visual perception: a critical edition, with English translation and commentary, of the first three books of Alhacen’s De aspectibus, the medieval latin version of Ibn al-Haytham’s Kitab al-Manazir, übers. und hg. V.A. Mark Smith, 2 Bde., Philadelphia 2001.
4. R. Bacon, Perspectiva (Opus maius, Teil 5). In: D.C. Lindberg, Roger Bacon and the Origins of Perspectiva in the Middle Ages, Oxford 1996.
5. J. Pecham, Perspectiva Communis. In: D.C. Lindberg, John Pecham and the Science of Optics, Madison (WI) 1970.