@article{PismaZhETF.95.168,
    title = {Fermi point in graphene as a monopole in momentum space},
    author = {Zubkov, M. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {95},
    issue = {3},
    pages = {168},
    year = {2012},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_29637.shtml},
}