%0 Journal Article %A Spohn, W. G. %T On the Derived Cuboid %J Canadian mathematical bulletin %D 1974 %P 575-577 %V 17 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1974-102-6/ %R 10.4153/CMB-1974-102-6 %F 10_4153_CMB_1974_102_6