@article{PismaZhETF.67.3,
    title = {Collective excitations of massive Dirac particles in a hot and dense medium},
    author = {Kalashnikov, O. K.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {67},
    issue = {1},
    pages = {3},
    year = {1998},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_15130.shtml},
}