@Article{ 
  MaMuPiSt15,
  author = { Mainini, Edoardo and Murakawa, Hideki and Piovano, Paolo and Stefanelli, Ulisse },
  title = { Carbon-nanotube geometries: analytical and numerical results },
  journal = { Discrete Contin. Dyn. Syst.-Series S },
  year = { 2017 },
  doi = { 10.3934/dcdss.2017008  },
  volume = { 10 },
  number = { 1 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/3096/ },
  note = { cvgmt preprint}
}