@article{DAN_1974_217_4_a6,
     author = {M. A. Pekker},
     title = {Resonances in the scattering of acoustic waves by a spherical inhomogeneity of the density},
     journal = {Doklady Akademii Nauk},
     pages = {766--769},
     publisher = {mathdoc},
     volume = {217},
     number = {4},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1974_217_4_a6/}
}