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3. Bobik, Joseph. 1965. Aquinas on Being and Essence: A Translation and Interpretation. Notre Dame: University of Notre Dame Press.
4. Brook, Angus. March 2015. “Substance and the Primary Sense of Being in Aristotle.” The Review of Metaphysics LXVIII (3): Issue 271: 521–544.
5. Cajetan. 1964. Commentary on St Thomas Aquinas’ on Being and Essence, Kendzierski and Wade (trans.,). Milwaukee: Marquette University Press.