TY - JOUR AU - G. F. Safina TI - Preservation of the frequencies of oscillations of a pipe with a liquid JO - Sibirskij žurnal industrialʹnoj matematiki PY - 2012 SP - 124 EP - 134 VL - 15 IS - 3 UR - http://geodesic.mathdoc.fr/item/SJIM_2012_15_3_a11/ LA - ru ID - SJIM_2012_15_3_a11 ER -