@misc{indiciae7f216c27bdb9,
  title = {Enhanced synaptic effectiveness following prolonged changes in synaptic use.},
  author = {R S April and W A Spencer},
  year = {1969},
  doi = {10.1007/bf01897493},
  url = {https://pubmed.ncbi.nlm.nih.gov/4312469/},
  note = {Source identifier: 4312469}
}