%0 Journal Article %A F. D. Rukhovich %T Outer billiards outside regular decagon: periodicity of almost all orbits and existence of aperiodic orbit %J Čebyševskij sbornik %D 2019 %P 406-441 %V 20 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/CHEB_2019_20_2_a32/ %G ru %F CHEB_2019_20_2_a32