1. British United Provident AssociationSchedule of procedures 1989. London: BUPA 1989.
2. Jones, S. M., Collins, D. Caseload or Workload? Scoring complexity of operative procedures as a means of analysing workload. Br. Med. J. 1990: 301, 324–5.
3. Gilmore, J. A., Griffiths, N. J., Connolly, J.et al. Surgical audit: comparison of the workload and results of two hospitals in the same district. Br. Med. J. 1980: 281, 1050–2.
4. Quill, D. S., Devlin, H. Plant, A., Denham, K. R., McNay, R. A., Morris, D. Surgical operation rates: a twelve year experience in Stockton on Tees. Ann. R. Coll. Surg. Engl. 1983: 65, 248–53.
5. Cobb, R. A., Balgrie, R. J., Faber, R. G., Reece-Smith, H. The workload of a surgical unit in a district general hospital. Ann. R. Coll. Surg. Engl. 1989: 71, 299–302.