@misc{indiciaee4b0bd349397,
  title = {A simple program for a phaseless recursive digital filter.},
  author = {P B Pynsent and R Hanka},
  year = {1982},
  doi = {10.1016/0141-5425(82)90011-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/7120982/},
  note = {Source identifier: 7120982}
}