TY  - JOUR
AU  - V. P. Egorov
TI  - The extremum principle for the generalized Neumann--Tricomi problem
JO  - Differencialʹnye uravneniâ
PY  - 1975
SP  - 708
EP  - 712
VL  - 11
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1975_11_4_a12/
LA  - ru
ID  - DE_1975_11_4_a12
ER  -