TY  - JOUR
AU  - N. A. Shananin
TI  - On local unsolvability and nonhypoellipticity of (pseudo-) differential equations with weighted symbols
JO  - Sbornik. Mathematics
PY  - 1984
SP  - 541
EP  - 556
VL  - 47
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1984_47_2_a15/
LA  - en
ID  - SM_1984_47_2_a15
ER  -