@article{PismaZhETF.34.252,
    title = {Inverse population in a paramagnetic crystal produced as a result of thermal excitation of the spin system by a pulsed magnetic field},
    author = {Vaisfel'd, M. P. and Imamutdinov, F. S. and Khasanov, A. Kh.},
    journal = {Письма в ЖЭТФ},
    volume = {34},
    issue = {5},
    pages = {252},
    year = {1981},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_23196.shtml},
}