@article{DAN_1984_275_2_a23,
     author = {Ya. B. Zel'dovich and D. D. Sokoloff},
     title = {Zeros of eigenfunctions of free and forced oscillations of},
     journal = {Doklady Akademii Nauk},
     pages = {358--361},
     publisher = {mathdoc},
     volume = {275},
     number = {2},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1984_275_2_a23/}
}