@article{PismaZhETF.13.80,
    title = {Magnetic Birefringence in Antiferromagnetic $MnF_2$},
    author = {Borovik-Romanov, A. S. and Kreines, N. M. and Talalaev, M. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {13},
    issue = {2},
    pages = {80},
    year = {1971},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_27163.shtml},
}