You would not have a link to where I might find that proof, would you?

Sure, here is the earliest one: https://en.wikipedia...wski_.281910.29

There are many more:

L ́evy-Leblond, J.M. (1976). One more derivation of the Lorentz transformation.

American Journal of Physics, 44, 271-277

Mermin, N. D. (1984). Relativity without light.American Journal of Physics,52, 119-124

Mitvalsky, V. (1966). Special relativity without the postulate of constancy of light,American Journal of Physics, 34, 825

Pal, Palash B, (2003). Nothing but relativity.European Journal of Physics, 24,315-319

Pauli, W. (1958).Theory of Relativity, (Pergamon, Oxford)

Schwartz, H. M. (1984). Deduction of the general Lorentz transformations from a set of necessary assumptions.American Journal of Physics, 52(4), 346-350

Schwartz, M. (1987). Principles of electrodynamics. Dover, New York

Sela, O., Tamir, B., Dolev, S. and Elitzur, A.C. (2009). Can special relativity be derived from Galilean mechanics alone?Foundations of Physics, 39,499-509

**Edited by zztop, 5 January 2017 - 05:29 PM.**