@article{PismaZhETF.51.317,
    title = {Upper critical field five times the Clogston paramagnetic limit in the organic superconductor (ET)$_4Hg_{2.89}Br_8$},
    author = {Lyubovskaya, R. N. and Lyubovskii, R. B. and Makova, M. K. and Pesotskii, S. I.},
    journal = {Письма в ЖЭТФ},
    volume = {51},
    issue = {6},
    pages = {317},
    year = {1990},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_17261.shtml},
}