@article{PismaZhETF.13.346,
    title = {Ionization Instability  and Motion of Glowing Spots in $Na_2ZnGeO_4$:Mn},
    author = {Fok, M. V. and L'vova, E. Yu.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {13},
    issue = {7},
    pages = {346},
    year = {1971},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24250.shtml},
}