Hofweber, Thomas. Logic and Ontology. The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. 2020 [23 December 2020]. (原始内容存档于2021-12-07).
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Hofweber, Thomas. Logic and Ontology. The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. 2020 [23 December 2020]. (原始内容存档于2021-12-07).