1. Where do you know what you know? The representation of semantic knowledge in the human brain;K Patterson;Nature Reviews Neuroscience,2007
2. Wittgenstein L (1953) Philosophical Investigations. Anscombe GEM, translator. Oxford: Blackwell.
3. Über Sinn und Bedeutung;G Frege;Zeitschrift für Philosophie und philosophische Kritik,1892
4. On denoting;B Russell;Mind,1905
5. Kripke SA (1980) Naming and necessity: Wiley-Blackwell.