McKenzie, Steven L. and Graham, Matt Patrick, The Hebrew Bible Today: An Introduction to Critical Issues, Westminster John Knox Press, 1998, ISBN0-664-25652-X, p. 39.
Rudavsky, Tamar, Time Matters: Time, Creation, and Cosmology in Medieval Jewish Philosophy, SUNY Press, 2000, ISBN0-7914-4453-8, p. 7.
Zohar, Bereshith to Lekh Lekha: Or, Book of Light, Forgotten Books, ISBN1-60506-746-6, p. 89.