TY  - JOUR
AU  - I. T. Kiguradze
TI  - On the periodic solutions of a system of ordinary differential equations with singularities
JO  - Doklady Akademii Nauk
PY  - 1971
SP  - 286
EP  - 289
VL  - 198
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1971_198_2_a7/
LA  - ru
ID  - DAN_1971_198_2_a7
ER  -