@article{PismaZhETF.21.281,
    title = {Inelastic scattering of upper-branch polaritons and their Bose-Einstein condensation},
    author = {Matsko, M. G.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {21},
    issue = {5},
    pages = {281},
    year = {1975},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_22307.shtml},
}