The familial classification of primary unipolar depression: biological validation of distinct subtypes.

@article{Lewis1983TheFC,
  title={The familial classification of primary unipolar depression: biological validation of distinct subtypes.},
  author={Debra A. Lewis and George Winokur},
  journal={Comprehensive psychiatry},
  year={1983},
  volume={24 6},
  pages={495-501}
}