@article{PismaZhETF.12.35,
    title = {Annular Trap for Low-frequency Wave in the Earth's Magnetosphere},
    author = {Gul'el'mi, A. V.},
    journal = {Письма в ЖЭТФ},
    volume = {12},
    issue = {1},
    pages = {35},
    year = {1970},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_26221.shtml},
}