TY  - JOUR
AU  - Najati, Abbas
AU  - Rassias, Themistocles M.
TI  - Pexider type operators and their norms in $X_{\lambda }$ spaces
JO  - Czechoslovak Mathematical Journal
PY  - 2009
SP  - 1087
EP  - 1094
VL  - 59
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMJ_2009__59_4_a16/
LA  - en
ID  - CMJ_2009__59_4_a16
ER  -