@misc{indiciae6b156a65d35e,
  title = {Time on target meter.},
  author = {N T Welford and H S Levin},
  year = {1979},
  doi = {10.1016/s0010-9452(79)80018-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/446041/},
  note = {Source identifier: 446041}
}