@article{PismaZhETF.19.751,
    title = {Concerning impuriton diffusion in solid $H^4$},
    author = {Pushkarov, D. I.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {19},
    issue = {12},
    pages = {751},
    year = {1974},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_27138.shtml},
}