@article{PismaZhETF.33.115,
    title = {Surface states in a gapless semiconductor},
    author = {D'yakonov, M. I. and Khaetskii, A. V.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {33},
    issue = {2},
    pages = {115},
    year = {1981},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_22948.shtml},
}