Coba jelasin Nota kaki dari Ruang-masa dalam bahasa melayu dong

^ bercahaya daripada lumen Latin, cahaya, +  ferens, membawa; aether dari bahasa Yunani αἰθήρ (aithēr), udara tulen, langit cerah.

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George F. Ellis and Ruth M. Williams (1992) Flat and curved space-times. Oxford Univ. Press. ISBN 0-19-851164-7

Isenberg, J. A. (1981) "Wheeler-Einstein-Mach spacetimes," Phys. Rev. D 24(2): 251–256.

Kant, Immanuel (1929) "Thoughts on the true estimation of living forces" in J. Handyside, trans., Kant's Inaugural Dissertation and Early Writings on Space. Univ. of Chicago Press.

Lorentz, H. A., Einstein, Albert, Minkowski, Hermann, and Weyl, Hermann (1952) The Principle of Relativity: A Collection of Original Memoirs. Dover.

Lucas, John Randolph (1973) A Treatise on Time and Space. London: Methuen.