TY  - JOUR
AU  - Medková, Dagmar
TI  - On essential norm of the Neumann operator
JO  - Mathematica Bohemica
PY  - 1992
SP  - 393
EP  - 408
VL  - 117
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/MB.1992.126064/
DO  - 10.21136/MB.1992.126064
LA  - en
ID  - 10_21136_MB_1992_126064
ER  -