@misc{indiciaec0c653f7e16a,
  title = {Relativistic calculation of atomic M-shell ionization by protons},
  author = {Chen, M. H. and Crasemann, B. and Mark, H.},
  year = {1983},
  url = {https://ntrs.nasa.gov/citations/19830050133},
  note = {Source identifier: 19830050133}
}