TY  - JOUR
AU  - A. I. Kozhanov
AU  - G. A. Lukina
TI  - Degeneration in differential equations with multiple characteristics
JO  - Matematičeskie zametki SVFU
PY  - 2021
SP  - 19
EP  - 30
VL  - 28
IS  - 3
UR  - http://geodesic.mathdoc.fr/item/SVFU_2021_28_3_a1/
LA  - ru
ID  - SVFU_2021_28_3_a1
ER  -