@article{PismaZhETF.29.223,
    title = {Nutation effect in a system of coherent excitons, photons, and biexcitons in the region of the M band},
    author = {Khadzhi, P. I. and Moskalenko, S. A. and Belkin, S. N.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {29},
    issue = {4},
    pages = {223},
    year = {1979},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_22061.shtml},
}