@article{PismaZhETF.22.357,
    title = {Secondary proton echo in periodic double-pulse excitation},
    author = {Alekseev, B. F. and Gadaev, V. D.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {22},
    issue = {7},
    pages = {357},
    year = {1975},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_23340.shtml},
}