TY - JOUR AU - D. A. Zakora AU - N. D. Kopachevsky TI - On small motions and normal oscillations of a hydrosystem “a viscous fluid + a system of ideal fluids” JO - Žurnal matematičeskoj fiziki, analiza, geometrii PY - 2002 SP - 420 EP - 426 VL - 9 IS - 3 UR - http://geodesic.mathdoc.fr/item/JMAG_2002_9_3_a9/ LA - ru ID - JMAG_2002_9_3_a9 ER -