TY  - JOUR
AU  - V. M. Karnaukhov
TI  - On local hypoellipticity of second-order operators with degenerate Levi matrix
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1985
SP  - 127
EP  - 128
VL  - 40
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1985_40_6_a10/
LA  - en
ID  - RM_1985_40_6_a10
ER  -