@article{PismaZhETF.39.537,
    title = {Thermodynamics of spin systems in periodic magnetic fields},
    author = {Fel'dman, E. B.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {39},
    issue = {12},
    pages = {537},
    year = {1984},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_19701.shtml},
}