TY  - JOUR
AU  - A. Dzhuraev
AU  - È. Muhamadiev
TI  - On the normal solvability and index of first-order systems of composite type
JO  - Doklady Akademii Nauk
PY  - 1977
SP  - 753
EP  - 756
VL  - 235
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1977_235_4_a6/
LA  - ru
ID  - DAN_1977_235_4_a6
ER  -