@article{PismaZhETF.38.20,
    title = {Observation of two-electron exchange between tin centers in solid $Pb_{1-x}Sn_xSe$ solutions},
    author = {Nasredinov, F. S. and Prokof'eva, L. V. and Zarubo, S. V. and Kurmantaev, A. N. and Seregin, P. P.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {38},
    issue = {1},
    pages = {20},
    year = {1983},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_22435.shtml},
}