Raatikainen, Panu (2018), Zalta, Edward N., ed., "Gödel's Incompleteness Theorems", The Stanford Encyclopedia of Philosophy (edisi ke-Fall 2018), Metaphysics Research Lab, Stanford University, diakses tanggal 23 Desember 2021
Koellner, Peter (2019), Zalta, Edward N., ed., "The Continuum Hypothesis", The Stanford Encyclopedia of Philosophy (edisi ke-Spring 2019), Metaphysics Research Lab, Stanford University, diakses tanggal 23 Desember 2021
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Aristotle, Metaphysics Bk IV, Chapter 3, 1005b "Physics also is a kind of Wisdom, but it is not the first kind. – And the attempts of some of those who discuss the terms on which truth should be accepted, are due to want of training in logic; for they should know these things already when they come to a special study, and not be inquiring into them while they are listening to lectures on it." W.D. Ross translation, in The Basic Works of Aristotle, ed. Richard McKeon, (Random House, New York, 1941)
