TY  - JOUR 
T1  - Environmental impact assessment, from Rio-92 to Rio+20 and beyond
JO  - Ambiente & Sociedade
A1  - Sánchez, Luis E.
A1  - Croal, Peter
SN  - 1414-753X
UL  - 10.1590/S1414-753X2012000300004
VL  - 15 
Y1  - 2012
PB  - Brasil 
ER  -