@article{RM_1997_52_1_a0,
     author = {R. R. Gadyl'shin},
     title = {Existence and asymptotics of poles with small imaginary part for the {Helmholtz} resonator},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {1--72},
     publisher = {mathdoc},
     volume = {52},
     number = {1},
     year = {1997},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1997_52_1_a0/}
}