@misc{indiciaef3f348aa31d2,
  title = {Electronic charge density in helium in the first order shielding approximation},
  author = {Epstein, J. H. and Epstein, S. T.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19660006960},
  note = {Source identifier: 19660006960}
}