@article{GDZPPN002042088, title = {D'Alembert's functional equation on restricted domains.}, journal = {Aequationes mathematicae}, volume = {52}, year = {1996}, pages = {246-253}, zbl = {0861.39018}, url = {http://dml.mathdoc.fr/item/GDZPPN002042088} }
Fochi, Margherita. D'Alembert's functional equation on restricted domains.. Aequationes mathematicae, Tome 52 (1996) pp. 246-253. http://gdmltest.u-ga.fr/item/GDZPPN002042088/