TY  - JOUR
AU  - A. R. Sagitova
TI  - On the deficiency indices of a~differential operator of fourth order
JO  - Matematičeskie zametki
PY  - 1995
SP  - 313
EP  - 314
VL  - 57
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1995_57_2_a17/
LA  - ru
ID  - MZM_1995_57_2_a17
ER  -