@misc{indiciaeb076b351293c,
  title = {Mass Polarization Effect in He-like Ions: First and Second Order},
  author = {Bhatia, A. K. and Drachman, Richard J.},
  year = {2003},
  url = {https://ntrs.nasa.gov/citations/20030032466},
  note = {Source identifier: 20030032466}
}