TY  - JOUR
AU  - I. M. Petrushko
TI  - Boundary value problems for equations of mixed type
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1968
SP  - 181
EP  - 200
VL  - 103
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TM_1968_103_a11/
LA  - ru
ID  - TM_1968_103_a11
ER  -