@article{PismaZhETF.77.407,
    title = {Evolution of cosmological constant in effective gravity},
    author = {Volovik, G. E.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {77},
    issue = {7},
    pages = {407},
    year = {2003},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_267.shtml},
}