@misc{indiciae9391d058cfb8,
  title = {Physiological parameters of mental load.},
  author = {J H Ettema and R L Zielhuis},
  year = {1971},
  doi = {10.1080/00140137108931232},
  url = {https://pubmed.ncbi.nlm.nih.gov/4399026/},
  note = {Source identifier: 4399026}
}