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• J. Brower, Aquinas's Ontology of the Material World (Oxford: 2014).

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• A. Kenny, Aquinas on Mind (New York: 1993).

• R. Pasnau, Theories of Cognition in the Later Middle Ages (Cambridge: 1997).

• R. Pasnau, Thomas Aquinas on Human Nature: a Philosophical Study of Summa Theologiae 1a 75-89 (Cambridge: 2002).

• A. Pegis, St. Thomas and the Problem of the Soul in the Thirteenth Century (Toronto: 1934).