%0 Journal Article
%A M. V. Shamolin
%T A new two-parameter family of phase portraits in the problem of
%J Doklady Akademii Nauk
%D 1994
%P 611-614
%V 337
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1994_337_5_a13/
%G ru
%F DAN_1994_337_5_a13