@article{PismaZhETF.52.1068,
    title = {Trapped phonons in the reflection spectra of GaAs/AlGaAs superlattices},
    author = {Pusen, Yu. A. and Milekhin, A. G. and Sinyukov, M. P. and Ploog, K. and Toropov, A. I.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {52},
    issue = {9},
    pages = {1068},
    year = {1990},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_17538.shtml},
}