%0 Journal Article
%A V. V. Vedyushkina
%T Topological type of isoenergy surfaces of billiard books
%J Sbornik. Mathematics
%D 2021
%P 1660-1674
%V 212
%N 12
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_2021_212_12_a0/
%G en
%F SM_2021_212_12_a0