@article{PismaZhETF.29.464,
    title = {Microwave tunnel echo in glass},
    author = {Smolyakov, B. P. and Khaimovich, E. P.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {29},
    issue = {8},
    pages = {464},
    year = {1979},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_22122.shtml},
}