@article{PismaZhETF.93.63,
    title = {Dimensional crossover in topological matter: Evolution of the multiple Dirac point in the layered system to the flat band on the surface},
    author = {Heikkilä, T. T. and Volovik, G. E.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {93},
    issue = {2},
    pages = {63},
    year = {2011},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_29111.shtml},
}