1. Fine, G., (1981): “Knowledge and Belief in Republic V”, Archiv für Geschichte der Philosophie pp. 40, 121–139.
2. Fine, G., (1990): “Knowledge and Belief in Republic 5–7”, reprinted in Fine (2004). Plato on Knowledge and Forms, Oxford University Press, Oxford, pp. 85–116.
3. Fronterotta, F., (2001): Methexis. La teoria platonica delle idee e la partecipazione delle cose empiriche, Scuola Normale Superiore, Pisa.
4. Fronterotta, F., (2007): “Einai, ousia e on nei libri centrali della Repubblica”, in Lisi, F., (ed.) The Ascent to the Good, Akademia Verlag, Sankt Augustin, pp. 115–60.
5. Gonzalez, F. (1996): “Propositions or Objects? A Critique of Gail Fine on Knowledge and Belief in Republic V”, Phronesis 41, pp. 245–275.