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@article{AM2_1985__28_137065, author = {Marek Kuczma and Bogdan Choczewski}, title = {On a system of functional equations.}, journal = {Aequationes mathematicae}, pages = {262--268}, publisher = {mathdoc}, volume = {28}, year = {1985}, zbl = {0571.39001}, url = {http://geodesic.mathdoc.fr/item/AM2_1985__28_137065/} }
Marek Kuczma; Bogdan Choczewski. On a system of functional equations.. Aequationes mathematicae, Tome 28 (1985), pp. 262-268. http://geodesic.mathdoc.fr/item/AM2_1985__28_137065/