====== Hélium ======
  * [[wp>fr:Hélium|Hélium]]
  * [[wp>Helium|Helium]]


===== Références =====

  * [[https://www.nytimes.com/2019/09/04/opinion/helium-shortage.html|Nothing on Earth Can Replace Helium — and It’s in Peril]] The New York Times 04/09/2019