TY  - JOUR 
T1  - Collaboration and learning
JO  - Archives of Endocrinology and Metabolism
A1  - Dib, Sergio A.
SN  - 2359-3997
UL  - 10.1590/2359-3997000000001
VL  - 59 
Y1  - 2015
PB  - Brasil 
ER  -