TY  - JOUR
AU  - N. Yu. Kapustin
TI  - On the theory of equations of mixed type
JO  - Differencialʹnye uravneniâ
PY  - 1982
SP  - 1078
EP  - 1080
VL  - 18
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1982_18_6_a20/
LA  - ru
ID  - DE_1982_18_6_a20
ER  -