TY  - JOUR
AU  - L. I. Anikeeva
TI  - The deficiency index of a certain higher order differential operator
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1977
VL  - 32
IS  - 1
UR  - http://geodesic.mathdoc.fr/item/RM_1977_32_1_a20/
LA  - ru
ID  - RM_1977_32_1_a20
ER  -