| dbp:ref
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- Stanford Encyclopedia of Philosophy (en)
- The Oxford Companion to Philosophy. Oxford University Press; 2005. (en)
- 'Biographies of Medieval Authors', Appendix C of The Cambridge History of Medieval Philosophy, ed. Robert Passnau, Vol. 2., Cambridge, 2010, pp.833-996. (en)
- The Cambridge Dictionary of Philosophy, 2nd ed. Cambridge University Press; 1999. (en)
- Concise Routledge Encyclopedia of Philosophy. Routledge; 2000. (en)
- The Oxford Companion to Philosophy. Oxford University Press; 1995. (en)
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