TY  - JOUR
AU  - A. G. Kuz'min
TI  - Investigation of boundary value problems for an equation of mixed type with a family of characteristics that cross the line of degeneracy twice
JO  - Differencialʹnye uravneniâ
PY  - 1979
SP  - 1478
EP  - 1490
VL  - 15
IS  - 8
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1979_15_8_a13/
LA  - ru
ID  - DE_1979_15_8_a13
ER  -