@misc{indiciaecb216e55ad4f,
  title = {What is a variable?},
  author = {S C Beyea and L H Nicoll},
  year = {1997},
  doi = {10.1016/s0001-2092(06)62696-3},
  url = {https://pubmed.ncbi.nlm.nih.gov/9293332/},
  note = {Source identifier: 9293332}
}