@article{Ramgoolam:2016Xj,
  author = "Ramgoolam, Sanjaye",
  title = "{Permutations and the combinatorics of gauge invariants for general $N$}",
  doi = "10.22323/1.263.0107",
  journal = "PoS",
  year = 2016,
  volume = "CORFU2015",
  pages = "107"
}