@article{PismaZhETF.96.72,
    title = {Back-to-back emission of the electrons in double photoionization\\ of helium},
    author = {Amusia, M. Ya. and Drukarev, E. G. and Liverts, E. Z.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {96},
    issue = {1},
    pages = {72},
    year = {2012},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_29864.shtml},
}