TY  - JOUR 
T1  - Binary ion exchange of metal ions in Y and X zeolites
JO  - Brazilian Journal of Chemical Engineering
A1  - Barros, M.A.S.D.
A1  - Zola, A.S.
A1  - Arroyo, P.A.
A1  - Sousa-Aguiar, E.F.
A1  - Tavares, C.R.G.
SN  - 0104-6632
UL  - 10.1590/S0104-66322003000400008
VL  - 20 
Y1  - 2003
PB  - Brasil 
ER  -