@article{PismaZhETF.11.18,
    title = {Concerning the Absence of Exact Mirror Equality Between Optical Antipodes},
    author = {Rivkind, A. I.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {11},
    issue = {1},
    pages = {18},
    year = {1970},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_26044.shtml},
}