@article{PismaZhETF.9.189,
    title = {Experimental Observation of the  Change of the Sign of the S-d Interaction},
    author = {Volkenshtein, N. V. and Ugodnikova, L. A. and Tsiovkin, Yu. N.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {9},
    issue = {3},
    pages = {189},
    year = {1969},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25304.shtml},
}