V. V. Nikulin, I. R. Shafarevich. Geometries and Groups. Springer, 1987. , . "Tore (notion géométrique)" at Encyclopédie des Formes Mathématiques Remarquables References External links Creation of a torus at cut-the-knot "4D torus" Fly-through cross-sections of a four-dimensional torus "Relational Perspective Map" Visualizing high dimensional data with flat torus Polydoes, doughnut-shaped polygons Archived at Ghostarchive and the Wayback Machine: Surfaces