@article{PismaZhETF.31.330,
    title = {Excitation of nuclear spin echo in magnetically ordered materials using  subharmonics and multiple frequencies},
    author = {Dudkin, V. I. and Petrun'kin, V. Yu.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {31},
    issue = {6},
    pages = {330},
    year = {1980},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_20305.shtml},
}