References
- Shepherd M. Research report: the General Practice Research Unit at the Institute of Psychiatry. Psychological Medicine 1973; 3: 525–529
- Shepherd M., Cooper B., Brown A. C., Kalton G. W. Psychiatric Illness in General Practice. Oxford University Press, London 1966
- Wilkinson G. Research report: the General Practice Research Unit at the Institute of Psychiatry. Psychological Medicine 1989; 19: 787–790