@article{PismaZhETF.45.3,
    title = {Topologically nontrivial loop monopoles},
    author = {Ovid'ko, I. A.},
    journal = {Письма в ЖЭТФ},
    volume = {45},
    issue = {1},
    pages = {3},
    year = {1987},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_18652.shtml},
}