T. D. J. Chappell (2006) "Reading the περιτροπή: Theaetetus 170c-171c" Phronesis 51(2), 109-139. プロタゴラス説が通常の解釈で「Truth simpliciter なるものはなく truth for A があるだけだ」と理解されるところ，そうではなく「Truth simpliciter …

Sarah Waterlow (1977) "Protagoras and Inconsistency: Theaetetus 171a6-c7" Archiv für Geschichte der Philosophie 59 (1), 19-36. RIP Sarah Broadie.

Myles Burnyeat (1976) "Protagoras and Self-Refutation in Plato's Theaetetus" The Philosophical Review 85(2), 172-195.

Michael Wedin (2004) "On the Use and Abuse of Non-Contradiction: Aristotle's Critique of Protagoras and Heraclitus in Metaphysics Gamma 5" Oxford Studies in Ancient Philosophy 26, 213-239.

Mi-Kyoung Lee (2005) Epistemology after Protagoras: Responses to Relativism in Plato, Aristotle, and Democritus Oxford University Press. Ch.7. Aristotle on Protagoras and early conceptions of thinking and perceiving. 133-180.

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Mi-Kyoung Lee (2005) Epistemology after Protagoras: Responses to Relativism in Plato, Aristotle, and Democritus Oxford University Press. Chap.5. The Secret-Doctrine in Plato's Theaetetus. 77-117.

Mi-Kyoung Lee (2005) Epistemology after Protagoras: Responses to Relativism in Plato, Aristotle, and Democritus Oxford University Press. Chap.4. Self-Refutation and Contradiction. 46-76.

Mi-Kyoung Lee (2005) Epistemology after Protagoras: Responses to Relativism in Plato, Aristotle, and Democritus Oxford University Press. Chap.3. Protagoras and relativism. 30-45.