The use of self-rating scales in a single-patient multiple cross-over trial.

@article{Kellner1968TheUO,
  title={The use of self-rating scales in a single-patient multiple cross-over trial.},
  author={Robert Kellner and B F Sheffield},
  journal={The British journal of psychiatry : the journal of mental science},
  year={1968},
  volume={114 507},
  pages={
          193-6
        }
}