@article{PismaZhETF.23.408,
    title = {Production of heavy leptons in colliding $e^+e^-$ beams followed by the decay $L\to \mu(e)+\nu+\nu_L$},
    author = {Berkov, A. V. and Zhizhin, E. D. and Nikitin, Yu. P.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {23},
    issue = {7},
    pages = {408},
    year = {1976},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_27536.shtml},
}