%0 Journal Article %A Timothy Rouch %T Some sufficient conditions for regular approximate differentiability %J Colloquium Mathematicum %D 1979 %P 123-132 %V 41 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-41-1-123-132/ %R 10.4064/cm-41-1-123-132 %G en %F 10_4064_cm_41_1_123_132