@Article{ 
  Nal12,
  author = { Naldi, Simone },
  title = { Nonnegative polynomials and their Carathéodory number },
  journal = { Discrete Comput Geom },
  year = { 2014 },
  doi = { https://doi.org/10.1007/s00454-014-9588-3 },
  volume = { 51 },
  pages = { 559–568 },
  URL = { https://gecogedi.dimai.unifi.it/paper/298/ },
  note = { cvgmt preprint}
}