1. Bennett, J. 'Spinoza on Error' Philosophical Papers 15 (1986), pp. 59-73.
2. Descartes, R. Meditation IV (ed. Adam-Tannery, VII, pp. 57-60), trans. J. Cottingham in René Descartes: Meditations on First Philosophy, Cambridge: Cambridge University Press, 1986.
3. Leibniz, G. W. Discourse on Metaphysics, ed. and trans. R. Ariew and D. Garber, Indianapolis: Hackett Publishing Company, 1989, pp. 35-68.
4. - Correspondence with Amauld, trans. G. Montgomery, La Salle: Open Court Publishing Company, 1988, pp. 65-248.
5. - Sämtliche Schriften und Briefe, Herausgegeben von der Preussischen Akademie der Wissenschaften, referred to as PA in the text. I have used L. Loemker's translation in 'Leibniz's Doctrine of Ideas', Philosophical Review 55 (1946), p. 233.