%0 Journal Article %A V. Murugan %A P. V. Subrahmanyam %T Differentiable solutions for a class of functional equations %J Annales Polonici Mathematici %D 2007 %P 225-241 %V 92 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap92-3-3/ %R 10.4064/ap92-3-3 %G en %F 10_4064_ap92_3_3