Full reference OpenMind biblio ref
Sabra, Abdelhamid, Edward Grant, and John Murdoch. 1987. “Psychology Versus Mathematics: Ptolemy and Alhazen on the Moon Illusion”. In Mathematics and Its Applications to Science and Natural Philosophy in the Middle Ages, 217-47. Cambridge: Cambridge University Press.
{ Abdelhamid Sabra, Edward Grant, John Murdoch, 1987 #727 }