1. Lloyd, G.E.R. (1968) Aristotle: The Growth and Structure of His Thought. Cambridge Univ. Press, Cambridge, 133-139.
2. Newton, I., Motte, A. and Chittenden, N.W. (1846) Newton’s Principia: The Mathematical Principles of Natural Philosophy.https://www.loc.gov/item/04014428
3. Mach's Principle and a Relativistic Theory of Gravitation
4. Mach's Principle in General Relativity