TY - JOUR AU - A. P. Markeev TI - On the stability of periodic trajectories of a~planar Birkhoff billiard JO - Informatics and Automation PY - 2016 SP - 206 EP - 217 VL - 295 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TRSPY_2016_295_a11/ LA - ru ID - TRSPY_2016_295_a11 ER -