TY  - JOUR
AU  - M. B. Sheftel
TI  - Higher integrals and symmetries of semi-Hamiltonian systems
JO  - Differencialʹnye uravneniâ
PY  - 1993
SP  - 1782
EP  - 1795
VL  - 29
IS  - 10
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1993_29_10_a13/
LA  - ru
ID  - DE_1993_29_10_a13
ER  -