%0 Journal Article
%A V. V. Vedyushkina
%A V. A. Kibkalo
%A S. E. Pustovoitov
%T Realization of focal singularities of integrable systems using billiard books with a Hooke potential field
%J Čebyševskij sbornik
%D 2021
%P 44-57
%V 22
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CHEB_2021_22_5_a4/
%G ru
%F CHEB_2021_22_5_a4