@article{PismaZhETF.33.445,
    title = {Subharmonic radiation during parametric excitation in the nuclear-spin-wave region},
    author = {Govorkov, S. A. and Tulin, V. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {33},
    issue = {9},
    pages = {445},
    year = {1981},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_23052.shtml},
}