@article{10_37236_678,
     author = {Frank Ruskey and Mark Weston},
     title = {Spherical {Venn} diagrams with involutory isometries},
     journal = {The electronic journal of combinatorics},
     year = {2011},
     volume = {18},
     number = {1},
     doi = {10.37236/678},
     zbl = {1226.68073},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/678/}
}