@misc{indiciaee42afcd8aaee,
  title = {Communication by eye closure--a microcomputer-based system for the disabled.},
  author = {K T Grattan and A W Palmer and S R Sorrell},
  year = {1986},
  url = {https://pubmed.ncbi.nlm.nih.gov/2945772/},
  note = {Source identifier: 2945772}
}