@misc{indiciaeb588043146a5,
  title = {A variable frequency, variable selectivity filter for electroencephalography.},
  author = {H C BECKER and W A MICKLE and R G HEATH},
  year = {1958},
  doi = {10.1016/0013-4694(58)90080-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/13597824/},
  note = {Source identifier: 13597824}
}