TY  - JOUR
AU  - A. Dzhuraev
TI  - Boundary value problems for systems of second order equations of composite type which have one multiple family of real characteristics
JO  - Doklady Akademii Nauk
PY  - 1969
SP  - 1002
EP  - 1005
VL  - 186
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1969_186_5_a3/
LA  - ru
ID  - DAN_1969_186_5_a3
ER  -