Weatherson, Brian (2016). "David Lewis". The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Archived from the original on 22 Feb 2024. Retrieved 15 May 2021.
Menzel, Christopher (Feb 8, 2016). "Possible Worlds". The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Archived from the original on 22 Feb 2024. Retrieved 28 November 2020.
Stoecker, Ralf (2003). "Climbers, Pigs and Wiggled Ears-The Problem of Waywardness in Action Theory". Physicalism and Mental Causation. Imprint Academic. pp. 296–322.
Morris, William Edward; Brown, Charlotte R. (2021). "David Hume". The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Retrieved 16 May 2021.
Schaffer, Jonathan (2016). "The Metaphysics of Causation". The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Retrieved 16 May 2021.
Weatherson, Brian (2016). "David Lewis". The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Archived from the original on 22 Feb 2024. Retrieved 15 May 2021.
Menzel, Christopher (Feb 8, 2016). "Possible Worlds". The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Archived from the original on 22 Feb 2024. Retrieved 28 November 2020.
Wilson, George; Shpall, Samuel; Piñeros Glasscock, Juan S. (2016). "Action". The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University.
Malpas, Jeff (2019). "Donald Davidson: 2.1 Reasons as Causes". The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Retrieved 1 March 2021.
Schroeder, Tim (2020). "Desire". The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Retrieved 18 May 2021.
Finlay, Stephen; Schroeder, Mark (2017). "Reasons for Action: Internal vs. External". The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Retrieved 19 May 2021.
Cohon, Rachel (2018). "Hume's Moral Philosophy: 5. Is and ought". The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Retrieved 21 May 2021.
van Roojen, Mark (2018). "Moral Cognitivism vs. Non-Cognitivism". The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Retrieved 10 December 2020.
Sayre-McCord, Geoff (2020). "Moral Realism". The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Retrieved 21 May 2021.
Joyce, Richard (2016). "Moral Anti-Realism". The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Retrieved 21 May 2021.