TY  - JOUR 
T1  - 
       
JO  - JISTEM - Journal of Information Systems and Technology Management
A1  - Pinto, Nuno Gama de Oliveira
SN  - 1807-1775
UL  - 10.4301/S1807-17752009000100006
VL  - 6 
Y1  - 2009
PB  - Brasil 
ER  -