@article{PismaZhETF.13.251,
    title = {Observation of Optical Orientation of Equilibrium Electrons in n-Type Semiconductors},
    author = {Ekimov, A. I. and Safarov, V. I.},
    journal = {Письма в ЖЭТФ},
    volume = {13},
    issue = {5},
    pages = {251},
    year = {1971},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24073.shtml},
}