%0 Journal Article %A R. R. Gadyl'shin %T Existence and asymptotics of poles with small imaginary part for the Helmholtz resonator %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1997 %P 1-72 %V 52 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1997_52_1_a0/ %G en %F RM_1997_52_1_a0