%0 Journal Article
%A V. V. Vedyushkina
%A V. A. Kibkalo
%T Realization of numeriсal invariant of the Siefert bundle of integrable systems by billiards
%J Vestnik Moskovskogo universiteta. Matematika, mehanika
%D 2020
%P 22-28
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/VMUMM_2020_4_a2/
%G ru
%F VMUMM_2020_4_a2