@article{PismaZhETF.6.981,
    title = {Hysteresis of Cyclotron Absorption by the Carriers in a Nonparabolic Band},
    author = {Levinson, I. B. and Shvarts, M. L.},
    journal = {Письма в ЖЭТФ},
    volume = {6},
    issue = {12},
    pages = {981},
    year = {1967},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25555.shtml},
}