@article{PismaZhETF.8.239,
    title = {Free Radicals as Chains of Spins with Antiferromagnetic Interaction},
    author = {Karimov, Yu. S.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {8},
    issue = {5},
    pages = {239},
    year = {1968},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25985.shtml},
}