TY  - JOUR
AU  - S. K. Kumykova
TI  - A certain problem with nonlocal boundary conditions on the characteristics for an equation of mixed type
JO  - Differencialʹnye uravneniâ
PY  - 1974
SP  - 78
EP  - 88
VL  - 10
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1974_10_1_a9/
LA  - ru
ID  - DE_1974_10_1_a9
ER  -