@misc{indiciaef156e3f99ebe,
  title = {Graphical and statistical techniques for cardiac cycle time (phase) dependent changes in interbeat interval.},
  author = {J R Jennings and M W van der Molen and R J Somsen and K R Ridderinkhof},
  year = {1991},
  doi = {10.1111/j.1469-8986.1991.tb02001.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/1758935/},
  note = {Source identifier: 1758935}
}