TY  - JOUR
AU  - I. V. Mustyatsa
TI  - Union of derivative chains of two quadratic pencils of unbounded operators
JO  - Matematičeskie zametki
PY  - 1992
SP  - 85
EP  - 90
VL  - 51
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1992_51_4_a10/
LA  - ru
ID  - MZM_1992_51_4_a10
ER  -