TY  - JOUR
AU  - Štefan Schwabik
TI  - A remark on the d-characteristic and the $d_{Ξ}$-characteristic of linear operators in a Banach space
JO  - Studia Mathematica
PY  - 1973
SP  - 251
EP  - 255
VL  - 48
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/sm-48-3-251-255/
DO  - 10.4064/sm-48-3-251-255
LA  - en
ID  - 10_4064_sm_48_3_251_255
ER  -