1. Annas, J. (1993). The morality of happiness. Oxford University Press.
2. Annas, J. (1998). Doing without objective values: Ancient and modern strategies. In S. Everson (Ed.), Ethics. Companions to ancient thought 4 (pp. 193–220). Cambridge University Press.
3. Annas, J., & Barnes, J. (1985). The modes of Scepticism. Cambridge University Press.
4. Bett, R. (1996). Sextus Empiricus: Against the ethicists. Clarendon Press.
5. Bett, R. (2000). Pyrrho, his Antecedents, and his legacy. Oxford University Press.