Maier, John (2021). «Abilities: 1. A taxonomy». The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Consultado em 31 de agosto de 2021
Wilson, George; Shpall, Samuel; Piñeros Glasscock, Juan S. (2016). «Action». The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University
Maier, John (2021). «Abilities: 3. Hypothetical theories of ability». The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Consultado em 31 de agosto de 2021
Maier, John (2021). «Abilities: 4. Modal theories of ability». The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Consultado em 31 de agosto de 2021
Menzel, Christopher (2021). «Possible Worlds». The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Consultado em 4 de setembro de 2021
Maier, John (2021). «Abilities: 5. New approaches to ability». The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Consultado em 31 de agosto de 2021
Maier, John (2021). «Abilities: 2. Two fundamental distinctions». The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Consultado em 31 de agosto de 2021
Margolis, Eric; Laurence, Stephen (2021). «Concepts: 1. The ontology of concepts». The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Consultado em 8 de setembro de 2021