%0 Journal Article %A Z. Krzeszowiak-Dybiec %T On differentiable solutions of some systems of functional equations of p-th order %J Annales Polonici Mathematici %D 1980 %P 135-148 %V 37 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-37-2-135-148/ %R 10.4064/ap-37-2-135-148 %G en %F 10_4064_ap_37_2_135_148