@article{PismaZhETF.5.87,
    title = {Two-frequency Excitation of Quadrupole Spin Echo},
    author = {Grechishkin, V. S and Ainbinder, N. E.},
    journal = {Письма в ЖЭТФ},
    volume = {5},
    issue = {3},
    pages = {87},
    year = {1967},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25106.shtml},
}