TY  - JOUR
AU  - S. I. Piskarev
TI  - Compactness properties in the theory of the cosine operator functions
JO  - Matematičeskie zametki
PY  - 1992
SP  - 151
EP  - 153
VL  - 51
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1992_51_5_a20/
LA  - ru
ID  - MZM_1992_51_5_a20
ER  -