TY  - JOUR
AU  - I. N. Lanin
TI  - A certain boundary value problem for a second order mixed type equation with several parallel lines of degeneracy
JO  - Differencialʹnye uravneniâ
PY  - 1977
SP  - 168
EP  - 169
VL  - 13
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1977_13_1_a23/
LA  - ru
ID  - DE_1977_13_1_a23
ER  -