@misc{indiciaecb1b881ceb04,
  title = {Encoding and signal processing.},
  author = {C D Cullum},
  year = {1972},
  doi = {10.1111/j.1749-6632.1972.tb13115.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/4500481/},
  note = {Source identifier: 4500481}
}