@article{PismaZhETF.76.296,
    title = {Black-hole horizon and metric singularity at the brane separating two sliding superfluids},
    author = {Volovik, G. E.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {76},
    issue = {5},
    pages = {296},
    year = {2002},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_9414.shtml},
}