@misc{indiciae1b673bd73788,
  title = {A solid state differential amplitude discriminator for single unit recording.},
  author = {L J Spalla and J C Boudreau},
  year = {1967},
  doi = {10.1016/0013-4694(67)90192-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/4168980/},
  note = {Source identifier: 4168980}
}