TY  - JOUR
AU  - S. L. Sobolev
TI  - On mixed problems for partial differential equations with two independent variables
JO  - Doklady Akademii Nauk
PY  - 1958
SP  - 555
EP  - 558
VL  - 122
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1958_122_4_a3/
LA  - ru
ID  - DAN_1958_122_4_a3
ER  -