@article{PismaZhETF.13.710,
    title = {Possibility of Multiply-valued Equilibrium Distribution of the Carriers in many-valley Semiconductors},
    author = {Kochelap, V. A. and Pipa, V. I. and Piskovoi, V. N. and Sokolov, V. N.},
    journal = {Письма в ЖЭТФ},
    volume = {13},
    issue = {12},
    pages = {710},
    year = {1971},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24381.shtml},
}