1. Ibn Ezra, A 2007, Yesod mora ve-sod Torah, eds. Y Cohen & U Ben Simon, Ramat Gan: Bar Ilan University.
2. Wittgenstein, L 1967, Philosophische Untersuchungen (Philosophical investigations), Oxford: Blackwell.
3. Plato 1925, Plato in Twelve Volumes, Vol. 9, trans. HN Fowler, Cambridge, MA: Harvard University Press; London: William Heinemann Ltd.
4. Frege, G 1948, ‘Sense and Reference’, in The Philosophical Review 57.3, 209–230.
5. Aristotle 1975, Categories and De Interpretatione, trans. JL Ackrill, Oxford University Press, USA.