TY - JOUR AU - S. Chen AU - B. Cong AU - D. Zhang AU - X. Liu AU - S. Shen TI - An undamped oscillation model with two JO - Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences PY - 2020 SP - 390 EP - 400 VL - 24 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VSGTU_2020_24_2_a9/ LA - en ID - VSGTU_2020_24_2_a9 ER -