TY  - JOUR 
T1  - Control of ammonia emissions in naturally ventilated dairy cattle facilities in Portugal
JO  - Engenharia Agrícola
A1  - Pereira, José
A1  - Trindade, Henrique
SN  - 0100-6916
UL  - 10.1590/S0100-69162014000300022
VL  - 34 
Y1  - 2014
PB  - Brasil 
ER  -