%0 Journal Article %A Dale Rolfsen %T Characterizing the 3-cell by its metric %J Fundamenta Mathematicae %D 1970 %P 215-223 %V 68 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-68-2-215-223/ %R 10.4064/fm-68-2-215-223 %G en %F 10_4064_fm_68_2_215_223