%0 Journal Article %A V. V. Vedyushkina %T Integrable billiard systems realize toric~foliations on lens spaces and the 3-torus %J Sbornik. Mathematics %D 2020 %P 201-225 %V 211 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_2020_211_2_a1/ %G en %F SM_2020_211_2_a1