@article{PismaZhETF.58.708,
    title = {Neutrino masses in superstring theories},
    author = {Asatryan, G. M. and Ioannisyan, A. N.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {58},
    issue = {9},
    pages = {708},
    year = {1993},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_17993.shtml},
}