1. Einstein, A. (1923), Albert Einstein Nobel Lecture. Lecture delivered to the Nordic Assembly of Naturalists at Gothenburg, July 11, 1923, NobelPrize.org. p. 489 https://www.nobelprize.org/prizes/physics/1921/einstein/lecture/
2. On the relative motion of the Earth and the luminiferous ether
3. Lorentz, Hendrik Antoon (1904), ”Electromagnetic phenomena in a system moving with any velocity smaller than that of light”, Proceedings of the Royal Netherlands Academy of Arts and Sciences, 6: pp. 809-831
4. Electromagnetic Phenomena in a System Moving with any Velocity Smaller than that of Light
5. Einstein, A. (1905), On the Electrodynamics of Moving Bodies https://einsteinpapers.press.princeton.edu/vol2-trans/154