@article{PismaZhETF.30.506,
    title = {Stark effect in shallow donors in gallium phosphide},
    author = {Kopylov, A. A. and Medvedev, S. P. and Pikhtin, A. N.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {30},
    issue = {8},
    pages = {506},
    year = {1979},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_20681.shtml},
}