TY - JOUR AU - E. I. Kugushev AU - T. V. Popova AU - S. V. Sazonov TI - On the motion of a system with a moving internal element in the presence of external viscous friction JO - Vestnik Moskovskogo universiteta. Matematika, mehanika PY - 2020 SP - 50 EP - 56 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VMUMM_2020_5_a6/ LA - ru ID - VMUMM_2020_5_a6 ER -