%0 Journal Article %A Luigi Paganoni %A Gian Luigi Forti %T On an alternative Cauchy equation in two unknown functions. Some classes of solutions. %J Aequationes mathematicae %D 1991 %P 271-295 %V 42 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/AM2_1991__42_3_137434/ %F AM2_1991__42_3_137434