@misc{indiciae17c933a5d7ae,
  title = {Return current in encephalography. Variational principles.},
  author = {L Heller},
  year = {1990},
  doi = {10.1016/s0006-3495(90)82575-3},
  url = {https://pubmed.ncbi.nlm.nih.gov/2306503/},
  note = {Source identifier: 2306503}
}