@article{PismaZhETF.12.496,
    title = {Bound States of an Electron and a Phonon in a Strong Magnetic Field},
    author = {Levinson, I. B.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {12},
    issue = {10},
    pages = {496},
    year = {1970},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_26368.shtml},
}