@misc{indiciaeb51e9e648eaa,
  title = {Filtering without phase shift.},
  author = {R L Longini and J P Giolma and C Wall and R F Quick},
  year = {1975},
  doi = {10.1109/tbme.1975.324517},
  url = {https://pubmed.ncbi.nlm.nih.gov/1193634/},
  note = {Source identifier: 1193634}
}