@misc{indiciaee99c6a690a80,
  title = {Secondary ionization in a flat universe},
  author = {Atrio-Barandela, F. and Doroshkevich, A. G.},
  year = {1994},
  url = {https://ntrs.nasa.gov/citations/19950035596},
  note = {Source identifier: 19950035596}
}