TY  - JOUR
AU  - K. T. Karimov
TI  - Keldysh problem for a three-dimensional equation of mixed type with three singular coefficients in a semi-infinite parallelepiped
JO  - Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹûternye nauki
PY  - 2020
SP  - 31
EP  - 48
VL  - 30
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/VUU_2020_30_1_a2/
LA  - ru
ID  - VUU_2020_30_1_a2
ER  -