1. Measuring referral rates;Roland,1992
2. Referral to medical outpatients: different agendas of patients;Wallace,1992
3. How well do general practitioners and hospital specialists work together? A qualitative study of co-operation and conflict within the medical profession;Marshall;Br J Gen Pract,1998
4. European Study of Referrals from Primary to Secondary Care,1992
5. Are follow-up consultations at medical outpatient departments futile?;Marsh;BMJ,1982