%0 Journal Article %A Wlodzimierz Waliszewski %T On differential spaces whose Cartesian product is a differentiable manifold %J Colloquium Mathematicum %D 1987 %P 205-209 %V 53 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-53-2-205-209/ %R 10.4064/cm-53-2-205-209 %G en %F 10_4064_cm_53_2_205_209