@article{DAN_1962_147_5_a5,
     author = {M. I. Elshin},
     title = {On a solution of a classical oscillation problem},
     journal = {Doklady Akademii Nauk},
     pages = {1013--1016},
     year = {1962},
     volume = {147},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_147_5_a5/}
}