TY  - JOUR
AU  - M. G. Karatopraklieva
TI  - On the theory of equations of mixed type with discontinuous coefficients. I
JO  - Differencialʹnye uravneniâ
PY  - 1987
SP  - 85
EP  - 102
VL  - 23
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1987_23_1_a9/
LA  - ru
ID  - DE_1987_23_1_a9
ER  -