%0 Journal Article
%A I. F. Kobtsev
%T An elliptic billiard in a~potential force field: classification of motions, topological analysis
%J Sbornik. Mathematics
%D 2020
%P 987-1013
%V 211
%N 7
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_2020_211_7_a4/
%G en
%F SM_2020_211_7_a4