TY  - JOUR
AU  - E. I. Moiseev
TI  - Disposition of the spectrum of the Tricomi problem for the Lavrent'ev--Bitsadze equation
JO  - Differencialʹnye uravneniâ
PY  - 1989
SP  - 97
EP  - 106
VL  - 25
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1989_25_1_a11/
LA  - ru
ID  - DE_1989_25_1_a11
ER  -