@article{PismaZhETF.90.659,
    title = {Osmotic pressure of matter and vacuum energy},
    author = {Volovik, G. E.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {90},
    issue = {9},
    pages = {659},
    year = {2009},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_28656.shtml},
}