@Article{ 
  ColLis18,
  author = { Collari, Carlo and Lisca, Paolo },
  title = { Symmetric union diagrams and refined spin models },
  journal = { Canadian Mathematical Bulletin },
  year = { 2018 },
  doi = { doi:10.4153/S0008439518000115 },
  pages = {  },
  URL = { https://gecogedi.dimai.unifi.it/paper/308/ },
  note = { cvgmt preprint}
}