TY - JOUR AU - A. I. Rubinshtein TI - On Some Dynamical Systems of the Second Order JO - Matematičeskoe obrazovanie PY - 2010 SP - 24 EP - 30 VL - 53 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MO_2010_53_1_a4/ LA - ru ID - MO_2010_53_1_a4 ER -