TY  - JOUR
AU  - T. Sh. Kal'menov
TI  - The spectrum of the Tricomi problem for a fourth-order equation of mixed type
JO  - Differencialʹnye uravneniâ
PY  - 1979
SP  - 354
EP  - 356
VL  - 15
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1979_15_2_a21/
LA  - ru
ID  - DE_1979_15_2_a21
ER  -