@article{DAN_1973_212_4_a16,
     author = {A. M. Radin and V. P. Shestopalov},
     title = {Diffraction of waves by a sphere with holes},
     journal = {Doklady Akademii Nauk},
     pages = {838--841},
     publisher = {mathdoc},
     volume = {212},
     number = {4},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_212_4_a16/}
}