TY  - JOUR
AU  - N. A. Shananin
TI  - On local solvability of equations of quasi-principal type
JO  - Sbornik. Mathematics
PY  - 1975
SP  - 458
EP  - 470
VL  - 26
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1975_26_4_a2/
LA  - en
ID  - SM_1975_26_4_a2
ER  -