A refined switch-activated time monitor for the measurement of sleep-onset latency.

@article{Viens1988ARS,
  title={A refined switch-activated time monitor for the measurement of sleep-onset latency.},
  author={M. Viens and Joseph M DE Koninck and H A van den Bergen and Ritchie Audet and Gunter Christ},
  journal={Behaviour research and therapy},
  year={1988},
  volume={26 3},
  pages={271-3}
}