TY  - JOUR
AU  - V. E. Shemarulin
TI  - Higher symmetry algebra structure and local equivalences of Euler--Darboux equations
JO  - Doklady Akademii Nauk
PY  - 1993
SP  - 24
EP  - 27
VL  - 330
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1993_330_1_a6/
LA  - ru
ID  - DAN_1993_330_1_a6
ER  -