TY  - JOUR 
T1  - Identification of Extra-Framework Species on Fe/ZSM-5 and Cu/ZSM-5 Catalysts Typical Microporous Molecular Sieves with Zeolitic Structure
JO  - Materials Research
A1  - Urquieta-González, E.A.
A1  - Martins, L.
A1  - Peguin, R.P.S.
A1  - Batista, M.S.
SN  - 1516-1439
UL  - 10.1590/S1516-14392002000300017
VL  - 5 
Y1  - 2002
PB  - Brasil 
ER  -