@article{PismaZhETF.47.532,
    title = {Elementary excitations in $CuO_2$ planes},
    author = {Barabanov, A. F. and Maksimov, L. A. and Uimin, G. V.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {47},
    issue = {10},
    pages = {532},
    year = {1988},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_16583.shtml},
}