@article{PismaZhETF.16.84,
    title = {Spin-lattice Relaxation in Grystals with Soft Optical Phonons},
    author = {Khmel'nitskii, D. E. and Shneerson, V. L.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {16},
    issue = {2},
    pages = {84},
    year = {1972},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_26735.shtml},
}