TY  - JOUR
AU  - A. Dzhuraev
TI  - Some problems for systems of first order partial differential equations of composite type in three-dimensional space
JO  - Doklady Akademii Nauk
PY  - 1980
SP  - 280
EP  - 286
VL  - 252
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1980_252_2_a5/
LA  - ru
ID  - DAN_1980_252_2_a5
ER  -