TY  - JOUR
AU  - A. G. Kuz'min
TI  - On the behavior of characteristics of equations of mixed type with a closed line of degeneracy
JO  - Differencialʹnye uravneniâ
PY  - 1982
SP  - 533
EP  - 534
VL  - 18
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1982_18_3_a19/
LA  - ru
ID  - DE_1982_18_3_a19
ER  -