TY - JOUR AU - Vlček, Vladimír TI - To existence of the periodic solution of a third-order nonlinear differential equation JO - Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica PY - 1990 SP - 123 EP - 163 VL - 29 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/AUPO_1990__29_1_a9/ LA - en ID - AUPO_1990__29_1_a9 ER -