@article{PismaZhETF.5.13,
    title = {Excitations of Exciton Type in a Gas},
    author = {Kazantsev, A. P.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {5},
    issue = {1},
    pages = {13},
    year = {1967},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25082.shtml},
}