1. Case mix definition by Diagnosis-Related Groups;Fetter;Med Care,1980
2. Hospital financing reform and case-mix measurement: an international review;Wiley;Health Care Financing Rev,1993
3. Gestión clínica: una visión actual del hospital;Casas,2001
4. Using patient classification systems to identify ambulatory care costs;Karpiel;Healthc Financ Manage,1994
5. Development and application of a population-oriented measure of ambulatory care case-mix;Weiner;Med Care,1991