@misc{indiciaea6bf432493c2,
  title = {A dual-frequency electrical impedance tomography system.},
  author = {H Griffiths and Z Zhang},
  year = {1989},
  doi = {10.1088/0031-9155/34/10/009},
  url = {https://pubmed.ncbi.nlm.nih.gov/2813513/},
  note = {Source identifier: 2813513}
}