TY  - JOUR
AU  - B. P. Paneah
TI  - A certain class of differential operators
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1961
VL  - 16
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1961_16_5_a20/
LA  - ru
ID  - RM_1961_16_5_a20
ER  -