@article{PismaZhETF.25.18,
    title = {Interband transitions and the possibility of current states in systems with electron-hole pairing},
    author = {Lozovik, Yu. E. and Yudson, V. I.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {25},
    issue = {1},
    pages = {18},
    year = {1977},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_21004.shtml},
}