@article{PismaZhETF.37.383,
    title = {$2\omega$ echo in a system with dynamic frequency shift (antiferromagnetic $MnCO_3$)},
    author = {Govorkov, S. A. and Tulin, V. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {37},
    issue = {8},
    pages = {383},
    year = {1983},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_22831.shtml},
}