Encyclopedia and dictionary articles

Cambridge Dictionary of Philosophy (ed. R. Audi, Cambridge 1995)

‘Epicureanism’, ‘Stoicism’, ‘Hellenistic Philosophy’

[Oxford Classical Dictionary] (3rd edition, 1996)

‘Academy’, ‘Anaxarchus’, ‘Crantor’, ‘Dialectic’, ‘Diodorus’, ‘Eubulides’, ‘Hippobotus’, ‘Megarian school’, ‘Nausiphanes’, ‘Nicias’, ‘Philo’, ‘Polemon’, ‘Stilpon’

The Encyclopedia of Classical Philosophy (ed. D.J. Zeyl, Westport, Ct. 1997)

‘Anonymous commentator on the Theaetetus’, ‘Colotes’, ‘Hermarchus’, ‘Metrodorus of Lampsacus’, ‘Polyaenus’

[The Routledge Encyclopedia of Philosophy] (ed. E. Craig, London, 1998)

‘Ancient philosophy’, ‘Atomism, ancient’, ‘Arete’, ‘Ariston of Chios’, ‘Chrysippus’, ’Cleanthes, ‘Epicurus’, ‘Epicureanism’, ‘Dialectical school’, ‘Hellenistic philosophy’, ‘Megarian school’, ‘Parmenides’, ‘Presocratic philosophy’, ‘Melissus’, ‘Stoicism’, ‘Zeno of Citium’

The Cambridge Dictionary of Classical Civilisation (ed. G. Shipley et al., Cambridge, 2006)

‘Matter’, ‘Philosophical schools’, ‘Philosophy, Greek’, ‘Sceptics’, ‘Stoicism’

The Classics of Western Philosophy, ed. J.J.E. Gracia, G.M. Reichberg, B.N. Schumacher (Oxford, 2003)

‘Lucretius, De Rerum Natura

The Stanford Encyclopedia of Philosophy, ed. E.N. Zalta

‘Lucretius’ (2004) ‘Plato, (2006) ‘Diodorus Cronus’ (2009)

The Handbook for Mereology (Munich, forthcoming)

‘Ancient Greek Atomism’

The Oxford Encyclopedia of Ancient Greece and Rome (Oxford, forthcoming)