TY  - JOUR
AU  - V. I. Cherepanov
TI  - The parametrization method in the perturbation theory for systems with $SR$-symmetry
JO  - Doklady Akademii Nauk
PY  - 1969
SP  - 820
EP  - 823
VL  - 184
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1969_184_4_a15/
LA  - ru
ID  - DAN_1969_184_4_a15
ER  -