@article{PismaZhETF.57.548,
    title = {Macroscopic quantum spin-flip in Ising nanoparticles},
    author = {Zvezdin, A. K. and Popkov, A. F.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {57},
    issue = {9},
    pages = {548},
    year = {1993},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_17835.shtml},
}