%0 Journal Article %A Collari, Carlo %A Lisca, Paolo %T Symmetric Union Diagrams and Refined Spin Models %J Canadian mathematical bulletin %D 2019 %P 451-468 %V 62 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4153/S0008439518000115/ %R 10.4153/S0008439518000115 %F 10_4153_S0008439518000115