@article{PFMT_2011_2_a1,
     author = {P. P. Andrusevich and V. A. Pletyukhov and V. I. Strazhev},
     title = {On internal symmetries of the {Dirac} equation in graphene},
     journal = {Problemy fiziki, matematiki i tehniki},
     pages = {11--14},
     publisher = {mathdoc},
     number = {2},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PFMT_2011_2_a1/}
}