TY  - JOUR
AU  - M. V. Shamolin
TI  - A new two-parameter family of phase portraits in the problem of
JO  - Doklady Akademii Nauk
PY  - 1994
SP  - 611
EP  - 614
VL  - 337
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1994_337_5_a13/
LA  - ru
ID  - DAN_1994_337_5_a13
ER  -