1. ARMSTRONG, A. H. (1953): Plotinus: A volume of selections. London: Allen and Unwin.
2. BARNES, J. (1984): The revised Oxford translation of Aristotle, vol. 2. Princeton: Princeton University Press.
3. BONS, J. A. E. (1993): ΑΜΦΙΒΟΛΙΑ: Isocrates and written composition. In: Mnemosyne, 46(2), pp. 160–171.
4. CLAY, D. (1994): The origins of the Socratic dialogues. In: P. A. Vander Waerdt (ed.): The Socratic movement. Ithaca & London: Cornell University Press, pp. 23–47.
5. DENNISTON, J. D. (1952): Greek prose style. Oxford: Oxford University Press.