TY  - JOUR
AU  - P. R. Popivanov
TI  - Local solvability of pseudodifferential operators with characteristics of second multiplicity
JO  - Sbornik. Mathematics
PY  - 1976
SP  - 193
EP  - 216
VL  - 29
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1976_29_2_a5/
LA  - en
ID  - SM_1976_29_2_a5
ER  -