@article{PismaZhETF.21.605,
    title = {Certain spaces that violate the causality principle},
    author = {Voronov, N. A.},
    journal = {Письма в ЖЭТФ},
    volume = {21},
    issue = {10},
    pages = {605},
    year = {1975},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_22500.shtml},
}