TY  - JOUR
AU  - Yu. M. Krikunov
TI  - A boundary value problem for the equation $u_{xx}+\operatorname{sgn}(xy)u_{yy}=0$
JO  - Trudy seminara po kraevym zadačam
PY  - 1974
SP  - 100
EP  - 106
VL  - 11
IS  - 11
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/KUKZ_1974_11_11_a12/
LA  - ru
ID  - KUKZ_1974_11_11_a12
ER  -