@article{PismaZhETF.7.446,
    title = {New Type of Current Instability in n-Germanium},
    author = {Kastal'skii, A. A. and Ryvkin, S. M.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {7},
    issue = {12},
    pages = {446},
    year = {1968},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25815.shtml},
}