TY  - JOUR 
T1  - The payment for performance model and its influence on British
          general practitioners' principles and practice
JO  - Cadernos de Saúde Pública
A1  - Norman, Armando Henrique
A1  - Russell, Andrew J.
A1  - Macnaughton, Jane
SN  - 0102-311X
UL  - 10.1590/0102-311X00149912
VL  - 30 
Y1  - 2014
PB  - Brasil 
ER  -