@misc{indiciaead77f266c1f7,
  title = {Interfacing Relativistic and Nonrelativistic Methods: A Systematic Sequence of Approximations},
  author = {Dyall, Ken and Langhoff, Stephen R.},
  year = {1997},
  url = {https://ntrs.nasa.gov/citations/20020042013},
  note = {Source identifier: 20020042013}
}