@article{Helayel-Neto:20137+,
  author = "Helayel-Neto, Jose Abdalla",
  title = "{The twelve colorful stones as building blocks}",
  doi = "10.22323/1.175.0028",
  journal = "PoS",
  year = 2013,
  volume = "ICMP 2012",
  pages = "028"
}