Schaffer, Jonathan (2018). «Monism». The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Consultado em 8 de abril de 2021
Menzel, Christopher (2017). «Possible Worlds». The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Consultado em 9 de abril de 2021
Berto, Francesco; Jago, Mark (2018). «Impossible Worlds». The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University
Smith, David Woodruff (2018). «Phenomenology». The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Consultado em 9 de abril de 2021
Miller, Alexander (2019). «Realism». The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University
Guyer, Paul; Horstmann, Rolf-Peter (2021). «Idealism». The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Consultado em 10 de abril de 2021
Stang, Nicholas F. (2021). «Kant's Transcendental Idealism». The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Consultado em 10 de abril de 2021
Culp, John (2020). «Panentheism». The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Consultado em 12 de abril de 2021
Kraut, Richard (2017). «Plato». The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Consultado em 24 de abril de 2021
Partenie, Catalin (2018). «Plato's Myths». The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Consultado em 24 de abril de 2021
Cohnitz, Daniel; Rossberg, Marcus (2020). «Nelson Goodman: 6. Irrealism and Worldmaking». The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Consultado em 15 de abril de 2021
Halvorson, Hans; Kragh, Helge (2019). «Cosmology and Theology: 7. Physical eschatology». The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Consultado em 13 de abril de 2021
Korab-Karpowicz, W. Julian (2018). «Political Realism in International Relations». The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Consultado em 14 de abril de 2021