@article{PismaZhETF.27.658,
    title = {Properties of the endpoint of a multiphonon spectrum},
    author = {lordanskii, S. V. and Pitaevskii, L. P.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {27},
    issue = {11},
    pages = {658},
    year = {1978},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_23797.shtml},
}