TY - JOUR AU - Ivan Yu. Polekhin TI - Some Results on the Existence of Forced Oscillations in Mechanical Systems JO - Informatics and Automation PY - 2020 SP - 267 EP - 279 VL - 310 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TRSPY_2020_310_a18/ LA - ru ID - TRSPY_2020_310_a18 ER -