@misc{indiciae8c6dbdb58890,
  title = {A low frequency active filter with plug-in tuning impedances.},
  author = {P Zalud and M Indra and I Krekule},
  year = {1975},
  url = {https://pubmed.ncbi.nlm.nih.gov/1199685/},
  note = {Source identifier: 1199685}
}