TY - JOUR AU - F. D. Rukhovich TI - Outer billiards outside regular decagon: periodicity of almost all orbits and existence of aperiodic orbit JO - Čebyševskij sbornik PY - 2019 SP - 406 EP - 441 VL - 20 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CHEB_2019_20_2_a32/ LA - ru ID - CHEB_2019_20_2_a32 ER -