1. Hahm, D.E., The origins of stoic cosmology (Ohio State University Press, Ohio, 1977)
2. Barbour, J.B., The discovery of dynamics (Oxford University Press, Oxford, 2001)
3. Jammer, M., Concepts of space (Harvard University Press, Cambridge, 1954)
4. Alexander, H.G., The Leibniz-Clarke correspondence (Manchester University Press, Manchester, 1956)
5. Barbour, J.B. and Pfister, H. (eds.), From Newton’s bucket to quantum gravity (Birkhäuser, Boston, 1995), p. 530