Oswald Hanfling, Ch. 5 "Logical positivism", in Stuart G Shanker, Philosophy of Science, Logic and Mathematics in the Twentieth Century (London: Routledge, 1996), pp. 193–194.
van Inwagen, Peter; Sullivan, Meghan (2021), Zalta, Edward N. (ed.), "Metaphysics", The Stanford Encyclopedia of Philosophy (Winter 2021 ed.), Metaphysics Research Lab, Stanford University, अभिगमन तिथि: 2022-03-05
Cohen, S. Marc; Reeve, C. D. C. (2021), Zalta, Edward N. (ed.), "Aristotle's Metaphysics", The Stanford Encyclopedia of Philosophy (Winter 2021 ed.), Metaphysics Research Lab, Stanford University, अभिगमन तिथि: 2022-03-05
Khlentzos, Drew (2021). "Challenges to Metaphysical Realism". The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. अभिगमन तिथि: 17 March 2021.
Hofweber, Thomas (2020). "Logic and Ontology". The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. अभिगमन तिथि: 23 December 2020.
