@article{10680,
  author = {G. Khayrallah and S. Smith},
  title = {Radiative lifetime measurement of the 31S, 31D, 41D, 41F, and 51F excited states of helium},
  year = {1978},
  journal = {Physical Review A},
  volume = {18},
  pages = {559-570},
  month = {Jan-08-1978},
  issn = {0556-2791},
  doi = {10.1103/PhysRevA.18.559},
}