TY  - JOUR
AU  - A. D. Bruno
TI  - Analytic invariants of a differential equation
JO  - Doklady Akademii Nauk
PY  - 1983
SP  - 781
EP  - 785
VL  - 273
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1983_273_4_a1/
LA  - ru
ID  - DAN_1983_273_4_a1
ER  -