@article{PismaZhETF.56.592,
    title = {Spin potential},
    author = {Marchenko, V. I.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {56},
    issue = {11},
    pages = {592},
    year = {1992},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_19547.shtml},
}