@article{PismaZhETF.67.771,
    title = {Hot-electron-pumped $K$-shell X-ray laser},
    author = {Chukhovskii, F. N. and Gibbon, P. and Uschmann, I. and Förster
, E.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {67},
    issue = {10},
    pages = {771},
    year = {1998},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_15333.shtml},
}