Long-term changes in sleep patterns in men on the South Polar Plateau.

@article{Natani1970LongtermCI,
  title={Long-term changes in sleep patterns in men on the South Polar Plateau.},
  author={K Natani and J T Shurley and Chester M Pierce and Robert E. Brooks},
  journal={Archives of internal medicine},
  year={1970},
  volume={125 4},
  pages={655-9}
}