@misc{indiciae38c5a346846f,
  title = {Electromagnetic fields in Khan-Penrose spacetime.},
  author = {TM Helliwell and DA Konkowski},
  year = {1990},
  doi = {10.1103/physrevd.41.2507},
  url = {https://pubmed.ncbi.nlm.nih.gov/10012635/},
  note = {Source identifier: 10012635}
}