@misc{indiciaee028653a6444,
  title = {Finite basis sets for the Dirac equation constructed from B splines.},
  author = {WR Johnson and SA Blundell and J Sapirstein},
  year = {1988},
  doi = {10.1103/physreva.37.307},
  url = {https://pubmed.ncbi.nlm.nih.gov/9899658/},
  note = {Source identifier: 9899658}
}