TY  - JOUR
AU  - V. R. Ol'shevskii
TI  - Change of Jordan structure of $G$-selfadjoint operators and selfadjoinl operator-functions under small perturbatios
JO  - Izvestiya. Mathematics 
PY  - 1991
SP  - 371
EP  - 395
VL  - 37
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM2_1991_37_2_a5/
LA  - en
ID  - IM2_1991_37_2_a5
ER  -