@misc{Langevin_Paul_(1872–1946)_Sur_1950,
 author={Langevin, Paul (1872–1946)},
 copyright={Public Domain},
 address={Paris},
 howpublished={online},
 year={1950},
 publisher={CNRS},
 language={fre},
 title={Sur la théorie de la relativité et l'expérience de M. Segnac, C. R. Acad. Sci., 1921, 173, 831},
 type={Text},
 URL={http://www.rcin.org.pl/Content/195770/PDF/WA35_226775_8818_Art24.pdf},
}