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@article{MV_1975_27_1_a27, author = {S. Czerwik}, title = {Continuous solutions of a functional equation}, journal = {Matemati\v{c}ki vesnik}, pages = {241 }, publisher = {mathdoc}, volume = {27}, number = {1}, year = {1975}, url = {http://geodesic.mathdoc.fr/item/MV_1975_27_1_a27/} }
S. Czerwik. Continuous solutions of a functional equation. Matematički vesnik, Tome 27 (1975) no. 1, p. 241 . http://geodesic.mathdoc.fr/item/MV_1975_27_1_a27/