@article{PismaZhETF.54.467,
    title = {Anomalously large change in sound velocity in erbium orthoferrite},
    author = {Buchel'nikov, V. D. and Bychkov, I. V. and Shavrov, V. G.},
    journal = {Письма в ЖЭТФ},
    volume = {54},
    issue = {8},
    pages = {467},
    year = {1991},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_18931.shtml},
}