TY  - JOUR
AU  - G. I. Èskin
TI  - Systems of pseudodifferential equations with simple real characteristics
JO  - Sbornik. Mathematics
PY  - 1968
SP  - 159
EP  - 183
VL  - 6
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1968_6_2_a2/
LA  - en
ID  - SM_1968_6_2_a2
ER  -