@misc{Langevin_Paul_(1872–1946)_Mesure_1950,
 author={Langevin, Paul (1872–1946)},
 copyright={Public Domain},
 address={Paris},
 howpublished={online},
 year={1950},
 publisher={CNRS},
 language={fre},
 type={Text},
 title={Mesure de la valence des ions dans les gaz, Le Radium, 1913, 10, 113},
 URL={http://rcin.org.pl/impan/Content/194044/PDF/WA35_226691_8818_Art9.pdf},
}