@article{PismaZhETF.34.183,
    title = {Interaction of pseudospins and the density spectrum of libration states in an $NH_4Cl$},
    author = {Belousov, M. V. and Petrikov, V. D.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {34},
    issue = {4},
    pages = {183},
    year = {1981},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_23161.shtml},
}